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Calculus of vector-valued functions
Vector calculus or vector analysis is a branch of mathematics concerned with the differentiation and integration of vector fields, primarily in three-dimensional
Vector_calculus
Mathematical identities
following are important identities involving derivatives and integrals in vector calculus. For a function f ( x , y , z ) {\displaystyle f(x,y,z)} in three-dimensional
Vector_calculus_identities
Branch of mathematics
infinitesimal calculus or the calculus of infinitesimals, it has two major branches, differential calculus and integral calculus. Differential calculus studies
Calculus
Specialized notation for multivariable calculus
matrix calculus into two separate groups. The two groups can be distinguished by whether they write the derivative of a scalar with respect to a vector as
Matrix_calculus
Circulation density in a vector field
In vector calculus, the curl, also known as rotor, is a vector operator that describes the infinitesimal circulation of a vector field in three-dimensional
Curl_(mathematics)
Multivariate derivative (mathematics)
In vector calculus, the gradient of a scalar-valued differentiable function f {\displaystyle f} of several variables is the vector field (or vector-valued
Gradient
Geometric object that has length and direction
physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude
Euclidean_vector
Broad concept generalizing scalars in mathematics and physics
field Vector notation, common notation used when working with vectors Vector operator, a type of differential operator used in vector calculus Vector product
Vector (mathematics and physics)
Vector_(mathematics_and_physics)
Assignment of a vector to each point in a subset of Euclidean space
In vector calculus and physics, a vector field is an assignment of a vector to each point in a space, most commonly Euclidean space R n {\displaystyle
Vector_field
System for describing optical polarization
be described using the Jones calculus, invented by R. C. Jones in 1941. Polarized light is represented by a Jones vector, and linear optical elements
Jones_calculus
Vector differential operator
or nabla, is an operator used in mathematics (particularly in vector calculus) as a vector differential operator, usually represented by ∇ (the nabla symbol)
Del
Operation on differential forms
generalization of Stokes' theorem, Gauss's theorem, and Green's theorem from vector calculus. If a differential k {\displaystyle k} -form is thought of as measuring
Exterior_derivative
Calculus of functions of several variables
calculus in three dimensional space is often called vector calculus. In single-variable calculus, operations like differentiation and integration are
Multivariable_calculus
Infinitesimal calculus on functions defined on a geometric algebra
and can be shown to reproduce other mathematical theories including vector calculus, differential geometry, and differential forms. With a geometric algebra
Geometric_calculus
Vector representing the position of a point with respect to a fixed origin
{OP}}.} The term position vector is used mostly in the fields of differential geometry, mechanics and occasionally vector calculus. Frequently this is used
Position_(geometry)
Tensor index notation for tensor-based calculations
underlying vector space. The number of indices equals the degree (or order) of the tensor. For compactness and convenience, the Ricci calculus incorporates
Ricci_calculus
Function acting on function spaces
calculus as well as vector calculus. In geometry, additional structures on vector spaces are sometimes studied. Operators that map such vector spaces to themselves
Operator_(mathematics)
Instantaneous rate of change (mathematics)
variables, with the others held constant. Partial derivatives are used in vector calculus and differential geometry. As with ordinary derivatives, multiple notations
Derivative
Statement about integration on manifolds
In vector calculus and differential geometry the generalized Stokes theorem (sometimes with apostrophe as Stokes' theorem or Stokes's theorem), also called
Generalized_Stokes_theorem
Mathematical concept applicable to physics
in applied mathematics and vector calculus which has many applications in physics. For transport phenomena, flux is a vector quantity, describing the magnitude
Flux
Study of rates of change
subjects such as real analysis, vector calculus, and multivariable calculus. The central idea of differential calculus is the derivative. For a real-valued
Differential_calculus
Book by Michael Spivak
functions of several variables, the book treats the classical theorems of vector calculus, including those of Green, Gauss, and Stokes, in the language of differential
Calculus_on_Manifolds_(book)
Coordinate system whose directions vary in space
may be, for example, scalars, vectors, or tensors. Mathematical expressions involving these quantities in vector calculus and tensor analysis (such as
Curvilinear_coordinates
Certain vector fields are the sum of an irrotational and a solenoidal vector field
theorem of vector calculus states that certain differentiable vector fields can be resolved into the sum of an irrotational (curl-free) vector field and
Helmholtz_decomposition
Operation in mathematical calculus
the gradient and curl of vector calculus, and Stokes' theorem simultaneously generalizes the three theorems of vector calculus: the divergence theorem
Integral
Vector field that is the gradient of some function
In vector calculus, a conservative vector field is a vector field that is the gradient of some function. A conservative vector field has the property
Conservative_vector_field
Type of derivative in mathematics
one-variable calculus, this is the tangent line approximation. In multivariable calculus, the same property is generalized to define the derivative of a vector-valued
Derivative (multivariable calculus)
Derivative_(multivariable_calculus)
Theorem in vector calculus
theorem in vector calculus on three-dimensional Euclidean space and real coordinate space, R 3 {\displaystyle \mathbb {R} ^{3}} . Given a vector field, the
Stokes'_theorem
British mathematician and electrical engineer (1850–1925)
equations (equivalent to the Laplace transform), independently developed vector calculus, and rewrote Maxwell's equations in the form commonly used today. He
Oliver_Heaviside
Mathematical concept in vector calculus
In vector calculus, a vector potential is a vector field whose curl is a given vector field. This is analogous to a scalar potential, which is a scalar
Vector_potential
Concept of vector calculus
In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0);
Closed and exact differential forms
Closed_and_exact_differential_forms
Textbook by E. B. Wilson based on the lectures of J. W. Gibbs
the notation and vocabulary of three-dimensional linear algebra and vector calculus, as used by physicists and mathematicians. It was reprinted by Yale
Vector_Analysis
Vector operator in vector calculus
In vector calculus, divergence is a vector operator that operates on a vector field, producing a scalar field giving the rate that the vector field alters
Divergence
Differential operator used in vector calculus
A vector operator is a differential operator used in vector calculus. Vector operators include: Gradient is a vector operator that operates on a scalar
Vector_operator
Vector field with zero divergence
In vector calculus a solenoidal vector field (also known as an incompressible vector field, a divergence-free vector field, or a transverse vector field)
Solenoidal_vector_field
Notation of differential calculus
settings—such as partial derivatives in multivariable calculus, tensor analysis, or vector calculus—other notations, such as subscript notation or the ∇
Notation_for_differentiation
Function valued in a vector space; typically a real or complex one
setting there are no orthonormal bases. In vector calculus and physics, a vector field is an assignment of a vector to each point in a space, most commonly
Vector-valued_function
matrix Curvature Green's theorem Divergence theorem Stokes' theorem Vector Calculus Infinite series Maclaurin series, Taylor series Fourier series Euler–Maclaurin
List_of_calculus_topics
Matrix of partial derivatives of a vector-valued function
In vector calculus, the Jacobian matrix (/dʒəˈkoʊbiən/, /dʒɪ-, jɪ-/) of a vector-valued function of several variables is the matrix of all its first-order
Jacobian matrix and determinant
Jacobian_matrix_and_determinant
American scientist (1839–1903)
problems in physical optics. As a mathematician, he created modern vector calculus (independently of the British scientist Oliver Heaviside, who carried
Josiah_Willard_Gibbs
Fundamental theorem of calculus (calculus) Gauss theorem (vector calculus) Gradient theorem (vector calculus) Green's theorem (vector calculus) Helly's selection
List_of_theorems
Algebra associated to any vector space
calculus variously as the calculus of extension (Whitehead 1898; Forder 1941), or extensive algebra (Clifford 1878), and recently as extended vector algebra
Exterior_algebra
Branch of mathematics
spaces, otherwise known as smooth manifolds. It uses the techniques of vector calculus, linear algebra and multilinear algebra. The field has its origins
Differential_geometry
Number, approximately 3.14
the residues at the poles of g(z). The constant π is ubiquitous in vector calculus and potential theory, for example in Coulomb's law, Gauss's law, Maxwell's
Pi
Mathematical operation on vectors in 3D space
all true vectors, the magnetic field B is a pseudovector. In vector calculus, the cross product is used to define the formula for the vector operator
Cross_product
Series of two mathematics textbooks
(1961). Calculus, Volume 1: Introduction, with vectors and analytic geometry (1st ed.). Blaisdell. Apostol, Tom M. (1962). Calculus, Volume 2: Calculus of
Calculus_(Apostol_books)
Formulas about vectors in three-dimensional Euclidean space
relations can be dated to founder of vector calculus Josiah Willard Gibbs, if not earlier. The magnitude of a vector A can be expressed using the dot product:
Vector_algebra_relations
Two Advanced Placement courses and exams
parametric equations, vector calculus, and polar coordinate functions, among other topics. AP Calculus AB is an Advanced Placement calculus course. It is traditionally
AP_Calculus
Topics referred to by the same term
Tensor calculus (also called tensor analysis), a generalization of vector calculus that encompasses tensor fields Vector calculus (also called vector analysis)
Calculus_(disambiguation)
Algebraic structure designed for geometry
geometric algebras went somewhat ignored, greatly eclipsed by the vector calculus then newly developed to describe electromagnetism. The term "geometric
Geometric_algebra
Representation of a tensor in Euclidean space
differential operators of vector calculus. The directional derivative of a scalar field Φ is the rate of change of Φ along some direction vector a (not necessarily
Cartesian_tensor
Mathematical function with multiple real-number arguments
vector fields is vector calculus. For more on the treatment of row vectors and column vectors of multivariable functions, see matrix calculus. A real-valued
Function of several real variables
Function_of_several_real_variables
Expression that may be integrated over a region
same way that the cross product in vector calculus allows one to compute the area vector of a parallelogram from vectors pointing up the two sides. Alternating
Differential_form
Partial differential equation used in physics
Matthews Vector Calculus, Springer 1998, ISBN 3-540-76180-2 H. M. Schey, Div Grad Curl and all that: An informal text on vector calculus, 4th edition
Electromagnetic_wave_equation
higher dimensions. Vector analysis also known as vector calculus, see vector calculus. Vector calculus a branch of multivariable calculus concerned with differentiation
Glossary of areas of mathematics
Glossary_of_areas_of_mathematics
Coordinates comprising a distance and an angle
{\pi }}.} Vector calculus can also be applied to polar coordinates. For a planar motion, let r {\displaystyle \mathbf {r} } be the position vector (r cos(φ)
Polar_coordinate_system
Vector calculus construction
dependent vector field is a construction in vector calculus which generalizes the concept of vector fields. It can be thought of as a vector field which
Time_dependent_vector_field
related to vectors: Vector algebra relations — regarding operations on individual vectors such as dot product, cross product, etc. Vector calculus identities
Lists_of_vector_identities
Vector field representation in 3D curvilinear coordinate systems
In vector calculus and physics, a vector field is an assignment of a vector to each point in a space. When these spaces are in (typically) three dimensions
Vector fields in cylindrical and spherical coordinates
Vector_fields_in_cylindrical_and_spherical_coordinates
Energy of a moving physical body
In physics, the kinetic energy of an object is the form of energy that it possesses due to its motion. In classical mechanics, the kinetic energy of a
Kinetic_energy
braid Gauss–Codazzi equations Gauss–Manin connection, a connection on a vector bundle over a family of algebraic varieties Gauss–Newton line – described
List of things named after Carl Friedrich Gauss
List_of_things_named_after_Carl_Friedrich_Gauss
Theorem in measure theory
justifying the use of a "restricted" measure in vector calculus. For instance, in Stokes' theorem as applied to a vector field flowing through a compact surface
Disintegration_theorem
Mathematical object used in fluid dynamics
Lamb vector is the cross product of vorticity vector and velocity vector of the flow field, named after the physicist Horace Lamb. The Lamb vector is defined
Lamb_vector
On products on sums of squares
identity and a special form of the Binet–Cauchy identity. In a more compact vector notation, Lagrange's identity is expressed as: ‖ a ‖ 2 ‖ b ‖ 2 − ( a ⋅ b
Lagrange's_identity
In vector calculus, the surface gradient is a vector differential operator that is similar to the conventional gradient. The distinction is that the surface
Surface_gradient
Definite integral of a scalar or vector field along a path
path L {\displaystyle L} . In qualitative terms, a line integral in vector calculus can be thought of as a measure of the total effect of a given tensor
Line_integral
Formula for the derivative of a product
In calculus, the product rule (or Leibniz rule or Leibniz product rule) is a formula used to find the derivatives of products of two or more functions
Product_rule
Mathematical notion of infinitesimal difference
differential refers to several related notions derived from the early days of calculus, put on a rigorous footing, such as infinitesimal differences and the derivatives
Differential_(mathematics)
Symbol used to indicate the del operator
credited with the development of the version of vector calculus most popular today. The influential 1901 text Vector Analysis, written by Edwin Bidwell Wilson
Nabla_symbol
Extension of the scalar spherical harmonics for use with vector fields
In mathematics, vector spherical harmonics (VSH) are an extension of the scalar spherical harmonics for use with vector fields. The components of the
Vector_spherical_harmonics
Theorem in calculus
In vector calculus, the divergence theorem, also known as Gauss's theorem or Ostrogradsky's theorem, is a theorem relating the flux of a vector field through
Divergence_theorem
Derivative in differential geometry and vector calculus
differential geometry and vector calculus, the second covariant derivative, or the second order covariant derivative, of a vector field is the derivative
Second_covariant_derivative
Study of curves from a differential point of view
the arc length, are expressed via derivatives and integrals using vector calculus. One of the most important tools used to analyze a curve is the Frenet
Differentiable_curve
Derivative of a function with multiple variables
all variables are allowed to vary). Partial derivatives are used in vector calculus and differential geometry. The partial derivative of a function f (
Partial_derivative
Differential calculus on function spaces
The calculus of variations (or variational calculus) is a field of mathematical analysis that uses variations, which are small changes in functions and
Calculus_of_variations
Set of coordinates where the coordinate hypersurfaces all meet at right angles
are a special but extremely common case of curvilinear coordinates. While vector operations and physical laws are normally easiest to derive in Cartesian
Orthogonal_coordinates
Equation in physics
(2005). Chapters 1 & 2 cover vector calculus and tensor calculus respectively. David Tong, Lectures on Vector Calculus. Freely available lecture notes
Inhomogeneous electromagnetic wave equation
Inhomogeneous_electromagnetic_wave_equation
In vector calculus, a Laplacian vector field is a vector field which is both irrotational and incompressible. If the field is denoted as v, then it is
Laplacian_vector_field
Physical quantity that changes sign with improper rotation
physics and mathematics, a pseudovector (or axial vector) is a quantity that transforms like a vector under continuous rigid transformations such as rotations
Pseudovector
Geometric model of the physical space
element of the group of rotations SO(3). Vector calculus is concerned with infinitesimal and cumulative changes to vector fields, primarily in three-dimensional
Three-dimensional_space
Vector in relativity
In special relativity, a four-vector (or 4-vector, sometimes Lorentz vector) is an element of a four-dimensional vector space object with four components
Four-vector
Theorem in calculus relating line and double integrals
In vector calculus, Green's theorem relates a line integral around a simple closed curve C to a double integral over the plane region D (surface in R
Green's_theorem
Elements of a field, e.g. real numbers, in the context of linear algebra
algebra Matrix (mathematics) Row and column vectors Tensor Vector (mathematics and physics) Vector calculus Lay, David C. (2006). Linear Algebra and Its
Scalar_(mathematics)
Branch of mathematics
integration, and basic optimization. Vector analysis, also called vector calculus, is part of calculus that deals with vector-valued functions. Real analysis
Mathematical_analysis
In vector calculus, a complex lamellar vector field is a vector field which is orthogonal to a family of surfaces. In the broader context of differential
Complex_lamellar_vector_field
Line or vector perpendicular to a curve or a surface
In geometry, a normal is an object (e.g. a line, ray, or vector) that is perpendicular to a given object. For example, the normal line to a plane curve
Normal_(geometry)
Mnemonic for 3D vectors orientations and rotations
counterclockwise) will unfasten the screw. In vector calculus, it is necessary to relate a normal vector of a surface to the boundary curve of the surface
Right-hand_rule
Foundational law of electromagnetism relating electric field and charge distributions
inverse-square laws. The law can be expressed mathematically using vector calculus in integral form and differential form; both are equivalent since they
Gauss's_law
Line integral of the electric field
{A} } where B is the magnetic field. By the fundamental theorem of vector calculus, such an A can always be found, since the divergence of the magnetic
Electric_potential
Calculus of functions generalization
finite-dimensional real vector space. This calculus is also known as advanced calculus, especially in the United States. It is similar to multivariable calculus but is
Calculus_on_Euclidean_space
Specification of a derivative along a tangent vector of a manifold
derivative is a generalization of the directional derivative from vector calculus. As with the directional derivative, the covariant derivative is a
Covariant_derivative
Vector calculus formulas relating the bulk with the boundary of a region
In mathematics, Green's identities are a set of three identities in vector calculus relating the bulk with the boundary of a region on which differential
Green's_identities
Number of times a curve wraps around a point in the plane
of study in algebraic topology, and they play an important role in vector calculus, complex analysis, geometric topology, differential geometry, and physics
Winding_number
Coefficients in angular momentum eigenstates of quantum systems
who encountered an equivalent problem in invariant theory. From a vector calculus perspective, the CG coefficients associated with the SO(3) group can
Clebsch–Gordan_coefficients
Mathematical gradient operator in certain coordinate systems
This is a list of some vector calculus formulae for working with common curvilinear coordinate systems. This article uses the standard notation ISO 80000-2
Del in cylindrical and spherical coordinates
Del_in_cylindrical_and_spherical_coordinates
Surface specified with parameters
representation. Surfaces that occur in two of the main theorems of vector calculus, Stokes' theorem, and the divergence theorem, are frequently given
Parametric_surface
studied Maxwell's A Treatise on Electricity and Magnetism and employed vector calculus to synthesize Maxwell's over 20 equations into the four recognizable
History of Maxwell's equations
History_of_Maxwell's_equations
In vector calculus, a Beltrami vector field, named after Eugenio Beltrami, is a vector field in three dimensions that is parallel to its own curl. That
Beltrami_vector_field
Foundational law of classical magnetism
added onto A to get an alternative choice for A, by the identity (see Vector calculus identities): ∇ × A = ∇ × ( A + ∇ ϕ ) {\displaystyle \nabla \times \mathbf
Gauss's_law_for_magnetism
Instantaneous rate of change of the function
multivariable calculus, the directional derivative measures the instantaneous rate at which a function changes along a specified vector through a given
Directional_derivative
VECTOR CALCULUS
VECTOR CALCULUS
Boy/Male
Australian, Basque, Czech, Czechoslovakian, Danish, Finnish, French, German, Hungarian, Latin, Polish, Slovenia, Swedish, Swiss, Ukrainian
The Conqueror; Victory; Victorious; Conquer
Boy/Male
Latin American Spanish
Conqueror.
Boy/Male
American, Australian, British, Chinese, Christian, Danish, Dutch, English, French, German, Greek, Italian, Latin, Portuguese, Shakespearean, Spanish
Steadfast; Anchor; Holds Fast; Star; Coined from Esther Vanhomrigh; Tenacious; Defend; Hold Fast; Coined from Esther Vanho
Surname or Lastname
Scottish
Scottish : Anglicized form of the Gaelic personal name Eachann (earlier Eachdonn, already confused with Norse Haakon), composed of the elements each ‘horse’ + donn ‘brown’.English : found in Yorkshire and Scotland, where it may derive directly from the medieval personal name. According to medieval legend, Britain derived its name from being founded by Brutus, a Trojan exile, and Hector was occasionally chosen as a personal name, as it was the name of the Trojan king’s eldest son. The classical Greek name, HektÅr, is probably an agent derivative of Greek ekhein ‘to hold back’, ‘hold in check’, hence ‘protector of the city’.German, French, and Dutch : from the personal name (see 2 above). In medieval Germany, this was a fairly popular personal name among the nobility, derived from classical literature. It is a comparatively rare surname in France.
Male
English
Roman Latin name VICTOR means "conqueror."Â
Boy/Male
American, British, Christian, Danish, Dutch, English, Finnish, French, German, Greek, Hindu, Indian, Irish, Jamaican, Latin, Romanian, Slovenia, Spanish, Swedish, Swiss, Tamil, Ukrainian
Victorious; Conqueror; Winner; Champion; One who Conquers; Victory
Boy/Male
Spanish American Shakespearean Greek Latin
Tenacious.
Boy/Male
Arthurian Legend
Father of Arthur.
Male
Greek
(á¼ÎºÏ„ωÏ) Variant spelling of Greek Hektor, EKTOR means "defend; hold fast."
Boy/Male
English American
Doctor; teacher.
Male
Portuguese
Portuguese form of Latin Hector, HEITOR means "defend; hold fast."
Male
Portuguese
Galician-Portuguese form of Roman Latin Victor, VITOR means "conqueror."
Male
English
 Anglicized form of Scottish Gaelic Eachann, HECTOR means "brown horse." Compare with another form of Hector.
Male
Russian
(Cyrillic Виктор): Slavic form of Roman Latin Victor, VIKTOR means "conqueror." In use by the Bulgarians, Russians and Serbians. Compare with another form of Viktor.
Boy/Male
Spanish
Victor.
Boy/Male
Christian & English(British/American/Australian)
Steadfast
Boy/Male
Christian & English(British/American/Australian)
Conqueror
Male
English
Short form of English Sylvester, VESTER means "from the forest."
Male
Scandinavian
 Scandinavian form of Roman Latin Victor, VIKTOR means "conqueror." Compare with another form of Viktor.
Male
Arthurian
, sir Hector de Maris; (defender).
VECTOR CALCULUS
VECTOR CALCULUS
Girl/Female
Bengali, Indian
Forest of Honey
Boy/Male
Hindu
Moon stone, Moon loved
Boy/Male
Australian, German
The People's Ruler
Boy/Male
Indian, Punjabi, Sikh
A Pearl
Boy/Male
Hindu, Indian, Kannada, Sanskrit, Telugu
Son of the Teacher
Boy/Male
Hebrew Ukrainian
God is my judge.
Male
Greek
(ὙμÎν) Short form of Greek Hymenaios, HYMÊN means "bridal song" or "wedding song."
Girl/Female
Native American
Stays at home.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit
Salutation
Boy/Male
Indian, Punjabi, Sikh
Matchless Brave
VECTOR CALCULUS
VECTOR CALCULUS
VECTOR CALCULUS
VECTOR CALCULUS
VECTOR CALCULUS
n.
The province of a rector; a parish church, parsonage, or spiritual living, with all its rights, tithes, and glebes.
a.
Of or pertaining to victory, or a victor' being a victor; bringing or causing a victory; conquering; winning; triumphant; as, a victorious general; victorious troops; a victorious day.
a.
Pertaining to a rector or a rectory; rectoral.
v. t.
To tamper with and arrange for one's own purposes; to falsify; to adulterate; as, to doctor election returns; to doctor whisky.
n.
A pregnant woman; a mother; as, A has a son B by one venter, and a daughter C by another venter; children by different venters.
n.
The ratio of one vector to another in length, no regard being had to the direction of the two vectors; -- so called because considered as a stretching factor in changing one vector into another. See Versor.
n.
The chief elective officer of some universities, as in France and Scotland; sometimes, the head of a college; as, the Rector of Exeter College, or of Lincoln College, at Oxford.
v. t.
To confer a doctorate upon; to make a doctor.
n.
A woman who wins a victory; a female victor.
n.
A contrivance for removing superfluous ink or coloring matter from a roller. See Doctor, 4.
n.
Any mechanical contrivance intended to remedy a difficulty or serve some purpose in an exigency; as, the doctor of a calico-printing machine, which is a knife to remove superfluous coloring matter; the doctor, or auxiliary engine, called also donkey engine.
n.
An African weaver bird (Textor alector).
n.
The turning factor of a quaternion.
n.
Same as Radius vector.
n.
A mathematical instrument, consisting of two rulers connected at one end by a joint, each arm marked with several scales, as of equal parts, chords, sines, tangents, etc., one scale of each kind on each arm, and all on lines radiating from the common center of motion. The sector is used for plotting, etc., to any scale.
n.
A directed quantity, as a straight line, a force, or a velocity. Vectors are said to be equal when their directions are the same their magnitudes equal. Cf. Scalar.
n.
A belly, or protuberant part; a broad surface; as, the venter of a muscle; the venter, or anterior surface, of the scapula.
n.
A term made up of the two parts / + /1 /-1, where / and /1 are vectors.
n.
An astronomical instrument, the limb of which embraces a small portion only of a circle, used for measuring differences of declination too great for the compass of a micrometer. When it is used for measuring zenith distances of stars, it is called a zenith sector.
v. t.
To treat as a physician does; to apply remedies to; to repair; as, to doctor a sick man or a broken cart.