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Model of a crystalline solid
The Einstein solid is a model of a crystalline solid that contains a large number of independent three-dimensional quantum harmonic oscillators of the
Einstein_solid
Empirical thermodynamic law
ionic heat capacity at temperature close to absolute zero, and as the Einstein solid, both recover the Dulong–Petit law at high temperature. The electronic
Dulong–Petit_law
German-born theoretical physicist (1879–1955)
Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist best known for developing the known theory of relativity. Einstein also
Albert_Einstein
Method in physics
a solid. It treats the vibrations of the atomic lattice (heat) as phonons in a box in contrast to the Einstein solid model, which treats the solid as
Debye_model
State of matter
In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities
Bose–Einstein_condensate
Observatory
The Einstein Tower (German: Einsteinturm) is an astrophysical observatory in the Albert Einstein Science Park in Potsdam, Germany. The Tower was built
Einstein_Tower
Feature seen when light is gravitationally lensed by an object
An Einstein ring, also known as an Einstein–Chwolson ring or Chwolson ring (named for Orest Chwolson), is created when light from a galaxy or star passes
Einstein_ring
Forms which matter can take
matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Different states are distinguished by the ways
State_of_matter
Description of the behaviour of bosons
In quantum statistics, Bose–Einstein statistics (B–E statistics) describes one of two possible ways in which a collection of non-interacting identical
Bose–Einstein_statistics
United States historic place
The Albert Einstein House at 112 Mercer Street in Princeton, Mercer County, New Jersey, United States, was the home of Albert Einstein from 1935 until
Albert_Einstein_House
Predecessor to modern quantum mechanics (1900–1925)
the work of Albert Einstein on the specific heats of solids in 1907 brought him to the attention of Walther Nernst. Einstein solid, followed by the Debye
Old_quantum_theory
Theoretical physicist (1879–1955)
outline is provided as an overview of and topical guide to Albert Einstein: Albert Einstein – German-born theoretical physicist. He developed the theory of
Outline_of_Albert_Einstein
State of matter
started to spontaneously crystallize and form a solid that maintains the inherent superfluidity of Bose–Einstein condensates. This setting realises a special
Supersolid
Albert Einstein's hypothetical situations to argue scientific points
A hallmark of Albert Einstein's career was his use of visualized thought experiments (German: Gedankenexperiment) as a fundamental tool for understanding
Einstein's thought experiments
Einstein's_thought_experiments
Research institute in Germany
Albert Einstein Science Park is located on the Telegrafenberg hill in Potsdam, Germany. The park was named after the physicist Albert Einstein. The best
Albert_Einstein_Science_Park
State of matter
Solid is a state of matter in which atoms are closely packed and are difficult to move past each other. Solids resist compression, expansion, or external
Solid
Equation in Brownian motion
Einstein relation is a previously unexpected[clarification needed] connection revealed independently by William Sutherland in 1904, Albert Einstein in
Einstein relation (kinetic theory)
Einstein_relation_(kinetic_theory)
Physics concept expressed as E = mc²
units of measurement. The principle is described by the physicist Albert Einstein's formula: E = m c 2 {\displaystyle E=mc^{2}} . In a reference frame where
Mass–energy_equivalence
Scientific field of study
technologies. For example, advances in the understanding of electromagnetism, solid-state physics, and nuclear physics led directly to the development of technologies
Physics
Branch of physics
director of the Max Planck Institute for Solid State Research, physics professor Manuel Cardona, it was Albert Einstein who created the modern field of condensed
Condensed_matter_physics
2003 play by Vern Thiessen
Einstein's Gift is a 2003 play written by Canadian playwright Vern Thiessen and published in 2003 by Playwrights Canada Press. Through the recollections
Einstein's_Gift
Play written by Ed Metzger
Albert Einstein: The Practical Bohemian is a stage play that is the only show officially endorsed by the Einstein family. A quote from Albert Einstein's first
Albert Einstein: The Practical Bohemian
Albert_Einstein:_The_Practical_Bohemian
Theory of gravitation as curved spacetime
theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in May 1916 and is the accepted
General_relativity
Model of electrons within a metallic solid
of the crystal lattice. Two famous quantum corrections include the Einstein solid model and the more refined Debye model. With the addition of the latter
Free_electron_model
US-American solid state physicist
Michael Behe. In 2007, his research group was the first to report Bose-Einstein condensation of polaritons in a trap. David Snoke and theoretical physicist
David_Snoke
Albert Einstein (1879–1955) was a renowned theoretical physicist of the 20th century, best known for his special and general theories of relativity. He
List of scientific publications by Albert Einstein
List_of_scientific_publications_by_Albert_Einstein
Quantities describing probability of absorption or emission of light
the Einstein coefficients are quantities describing the probability of absorption or emission of a photon by an atom or molecule. The Einstein A coefficients
Einstein_coefficients
Notebook of Albert Einstein
Albert Einstein's notebooks, from his time in Zürich. It contains much of Einstein's foundational work on general relativity. John D. Norton. "Einstein's Zurich
Zurich_Notebook
Theory of interwoven space and time by Albert Einstein
scientific theory of the relationship between space and time. In Albert Einstein's 1905 paper, "On the Electrodynamics of Moving Bodies", the theory is presented
Special_relativity
Emission of electrons when electromagnetic radiation hits a material
if light's energy accumulated over time from a continuous wave, Albert Einstein proposed that a beam of light is not a wave propagating through space,
Photoelectric_effect
X-ray telescope space observatory
Einstein Observatory (HEAO-2) was the first fully imaging X-ray telescope put into space and the second of NASA's three High Energy Astrophysical Observatories
Einstein_Observatory
third law of thermodynamics 1907 – Einstein uses quantum theory to estimate the heat capacity of an Einstein solid 1909 – Constantin Carathéodory develops
Timeline_of_thermodynamics
American economist (born 1930)
Sowell's book The Einstein Syndrome: Bright Children Who Talk Late was published in 2001. In it, Sowell discusses what he calls the "Einstein syndrome", which
Thomas_Sowell
temperatures and pressures, atoms form the three classical states of matter: solid, liquid and gas. Beyond these traditional classes, there exists an infinite
List_of_states_of_matter
classical theory for diamagnetism. 1907: Einstein solid model predicts the deviations for the specific heat of solids from Dulong–Petit law. The first theory
Timeline of condensed matter physics
Timeline_of_condensed_matter_physics
Einstein's committee of atomic scientists
Emergency Committee of Atomic Scientists (ECAS) was founded by Albert Einstein and Leó Szilárd in May, 1946, primarily as a fundraising and policy-making
Emergency Committee of Atomic Scientists
Emergency_Committee_of_Atomic_Scientists
Fluid which flows without losing kinetic energy
co-occurs with Bose–Einstein condensation (BEC), but neither phenomenon is directly related to the other; not all Bose–Einstein condensates can be regarded
Superfluidity
Investigations by Albert Einstein
Albert Einstein conducted several unsuccessful investigations. These pertain to quantum mechanics, superconductivity, and his details on his own theory
Einstein's unsuccessful investigations
Einstein's_unsuccessful_investigations
Branch of mathematics
Most prominently the language of differential geometry was used by Albert Einstein in his general theory of relativity, and subsequently by physicists in
Differential_geometry
Spectral density of light emitted by a black body
introduced merely to get the correct answer, other physicists including Albert Einstein built on his work, and Planck's insight is now recognized to be of fundamental
Planck's_law
Elementary particle or quantum of light
during the first two decades of the 20th century with the work of Albert Einstein, who built upon the research of Max Planck. While Planck was trying to
Photon
Model of electrical conduction
but their content is partially reconstructed from Einstein correspondence with Mileva Marić. Einstein first objection concerned a gap in Ludwig Boltzmann's
Drude_model
ring Einstein solid Einstein synchronisation Einstein tensor Einsteinhaus Einstein–Brillouin–Keller method Einstein–Cartan theory Einstein–Cartan–Evans
Index_of_physics_articles_(E)
Mathematical model combining space and time
further development of general relativity, Einstein fully incorporated the spacetime formalism. When Einstein published in 1905, another of his competitors
Spacetime
Mixture of an insoluble substance microscopically dispersed throughout another substance
silica gel with light opalescence A dollop of hair gel Creams are semi-solid emulsions of oil and water. Oil-in-water creams are used for cosmetic purpose
Colloid
Change of state of matter from a gas phase into a liquid phase
insulation, damp proofing or insulated glazing. Air well (condenser) Bose–Einstein condensate Cloud physics Condenser (heat transfer) DNA condensation Dropwise
Condensation
Description of physical properties at the atomic and subatomic scale
addition to the work of Planck, Einstein and Bohr mentioned above, Einstein and Peter Debye's work on the specific heat of solids, Bohr and Hendrika Johanna
Quantum_mechanics
Attraction of masses and energy
Gravity is described by the general theory of relativity, proposed by Albert Einstein in 1915, which describes gravity in terms of the curvature of spacetime
Gravity
English polymath (1773–1829)
William Herschel, Hermann von Helmholtz, James Clerk Maxwell, and Albert Einstein. Young is credited with establishing Christiaan Huygens' wave theory of
Thomas_Young_(scientist)
Volunteer computing project
Einstein@Home is a volunteer computing project that searches for signals from spinning neutron stars in data from gravitational-wave detectors, from large
Einstein@Home
Algebraic object with geometric applications
the rightmost expression the summation sign was suppressed: this is the Einstein summation convention, which will be used throughout this article. The components
Tensor
State of matter
fermionic particles at low temperatures. It is closely related to the Bose–Einstein condensate, which is commonly in a superfluid phase formed by bosonic particles
Fermionic_condensate
Physical process of transition between basic states of matter
the term is used to refer to changes among the basic states of matter: solid, liquid, and gas, and in rare cases, plasma. A phase of a thermodynamic
Phase_transition
Occurrence in collective excitations
Bose–Einstein condensation can occur in quasiparticles, particles that are effective descriptions of collective excitations in materials. Some have integer
Bose–Einstein condensation of quasiparticles
Bose–Einstein_condensation_of_quasiparticles
German-born American physicist and historian (born 1922)
present the history of Einstein's achievements. But Holton found that apart from Einstein's own essays there was then still little solid scholarship on this
Gerald_Holton
Physics Institute in Potsdam and Hanover
Gravitational Physics (Albert Einstein Institute) is a Max Planck Institute whose research is aimed at investigating Einstein's theory of relativity and beyond:
Max Planck Institute for Gravitational Physics
Max_Planck_Institute_for_Gravitational_Physics
Random motion of particles suspended in a fluid
supervision of Henri Poincaré. Then, in 1905, theoretical physicist Albert Einstein published a paper in which he modelled the motion of the pollen particles
Brownian_motion
Device that emits light via optical amplification
simple physical model for a laser begins with Albert Einstein's 1917 quantum theory of radiation. Einstein adopted only one quantum assumption from Bohr's
Laser
Branch of physics which studies the behavior of materials modeled as continuous media
constitutive relationships. Continuum mechanics treats the physical properties of solids and fluids independently of any particular coordinate system in which they
Continuum_mechanics
German–British physicist (1882–1970)
in the development of quantum mechanics. He also made contributions to solid-state physics and optics, and supervised the work of a number of notable
Max_Born
Property of a mathematical space
entropy). The best-known treatment of time as a dimension is Poincaré and Einstein's special relativity (and extended to general relativity), which treats
Dimension
Irish physicist
philosophy of 20th century science, including the discovery that Albert Einstein once attempted a steady-state model of the expanding universe, many years
Cormac_O'Raifeartaigh
Polariton condensation
Bose–Einstein condensation of polaritons is a growing field in semiconductor optics research, which exhibits spontaneous coherence similar to a laser,
Bose–Einstein condensation of polaritons
Bose–Einstein_condensation_of_polaritons
Belgian scientist and Catholic priest (1894–1966)
connect the observational Hubble–Lemaître law with the solution to the Einstein field equations in the general theory of relativity for a homogenous and
Georges_Lemaître
Tensor describing energy momentum density in spacetime
energy and momentum are the sources of the gravitational field in the Einstein field equations of general relativity, just as mass density is the source
Stress–energy_tensor
Collective excitation in superfluid helium-4 (a quasiparticle)
in 2018 with a Bose-Einstein condensate of Erbium atoms. Under specific conditions the roton minimum gives rise to a crystal solid-like structure called
Roton
Conglomeration of discrete solid, macroscopic particles
A granular material is a conglomeration of discrete solid, macroscopic particles characterized by a loss of energy whenever the particles interact (the
Granular_material
Obsolete postulated medium for the propagation of light
aether. This was further elaborated by Einstein in some semi-popular articles (1918, 1920, 1924, 1930). In 1918, Einstein publicly alluded to that new definition
Luminiferous_aether
Moment of inertia of diff geometric shapes
n_{i}I_{ij}n_{j}\,,} where the dots indicate tensor contraction and the Einstein summation convention is used. In the above table, n would be the unit Cartesian
List_of_moments_of_inertia
Chemical element with atomic number 2 (He)
phenomenon now called superfluidity. This phenomenon is related to Bose–Einstein condensation. In 1972, the same phenomenon was observed in helium-3, but
Helium
Aspect of relativity in physics
propagate away at the speed of light. They were first predicted by Albert Einstein as a consequence of his general theory of relativity, appearing as "ripples
Gravitational_wave
Classical statement of gravity as force
and a different constant. Newton's law was later superseded by Albert Einstein's theory of general relativity, but the universality of the gravitational
Newton's law of universal gravitation
Newton's_law_of_universal_gravitation
Materials classically predicted to be conductors, that are actually insulators
temperatures). These insulators fail to be correctly described by band theories of solids due to their strong electron–electron interactions, which are not considered
Mott_insulator
Facility in Germany for microgravity research
The Einstein-Elevator is a research platform for earthbound experiments under zero gravity conditions. Unlike other drop towers, only the experimental
Einstein-Elevator
German physicist (1858–1947)
most revolutionary idea which ever has shaken physics." In 1905, Albert Einstein published three papers in the journal Annalen der Physik. Planck was among
Max_Planck
Chemist (born 1965)
and medals, including the Nobel Prize in Chemistry (2025), the Albert Einstein World Award of Science (2017), the Wolf Prize in Chemistry (2018), the
Omar_M._Yaghi
Electromagnetic radiation humans can see
particles. With Einstein, they generalized this result for a whole set of integer spin particles called bosons (after Bose) that follow Bose–Einstein statistics
Light
State of matter of many bosons
composed of bosons, which have an integer value of spin and abide by Bose–Einstein statistics. The statistical mechanics of bosons were developed by Satyendra
Bose_gas
synthesized California, where it was first synthesized in LBNL Albert Einstein, German physicist Enrico Fermi, Italian physicist Dmitri Mendeleev, Russian
List_of_chemical_elements
Disordered magnetic state
at a temperature called the "freezing temperature," Tf. In ferromagnetic solids, component atoms' magnetic spins all align in the same direction. Spin glass
Spin_glass
Number of available physical states per energy unit
such as carrier concentration and Energy band gaps. Bose–Einstein statistics: The Bose–Einstein distribution function f B E ( E ) {\displaystyle f_{\mathrm
Density_of_states
German mathematician (1862–1943)
religion, but scientific results prove themselves in due time." Like Albert Einstein, Hilbert had closest contacts with the Berlin Group, whose leading founders
David_Hilbert
British chemist
Prize in 1972 and the Rutherford Memorial Medal in 1982. He won the Albert Einstein World Award of Science in 2011, the Royal Society of Chemistry's Centenary
Geoffrey_Ozin
relativity, including the motivation for the geodesic equation and the Einstein field equation, can be obtained from special relativity by examining the
Theoretical motivation for general relativity
Theoretical_motivation_for_general_relativity
State of matter at low temperatures
formation of the superfluid is a manifestation of the formation of a Bose–Einstein condensate of helium atoms. This condensation occurs in liquid helium-4
Superfluid_helium-4
Lowest theoretical temperature
mechanical phenomena such as superconductivity, superfluidity, and Bose–Einstein condensation. The particles still exhibit zero-point energy motion, as
Absolute_zero
Weak, attractive magnetism possessed by most elements and some compounds
materials, the electrons are delocalized, that is, they travel through the solid more or less as free electrons. Conductivity can be understood in a band
Paramagnetism
Region of uniform physical properties
states of matter such as gas, liquid, solid, plasma or Bose–Einstein condensate. Useful mesophases between solid and liquid form other states of matter
Phase_(matter)
Filipino rapper (born 1995)
You) began in 2022 as a demo that Makino sent to MC Einstein, who started working on it. MC Einstein approached Yeng Constantino, his labelmate at Cornerstone
Nik_Makino
Concept in physics
c^{2}D_{s}D_{i}}} where θ E i {\displaystyle \theta _{Ei}} is the so-called Einstein angular radius of a point lens M i {\displaystyle M_{i}} . For a single
Gravitational lensing formalism
Gravitational_lensing_formalism
German physical chemist (1864–1941)
absolute zero. This fall was predicted for liquids and solids in a 1909 paper of Albert Einstein's on the quantum mechanics of specific heats at cryogenic
Walther_Nernst
Regular pattern of magnetic moment ordering
matter physics Phases Phase transition QCP States of matter Solid Liquid Gas Plasma Bose–Einstein condensate Bose gas Fermionic condensate Fermi gas Fermi
Antiferromagnetism
Exact solution to the Einstein field equations
general relativity, the Oppenheimer–Snyder model is a solution to the Einstein field equations based on the Schwarzschild metric describing the collapse
Oppenheimer–Snyder_model
Intensive quantity, heat capacity per amount of substance
vibrations in solids, and sometimes a modest contribution from conduction electrons in metals. These are not degrees of freedom treated in the Einstein or Debye
Molar_heat_capacity
German chemist (1868–1934)
Grundmann, Siegfried (2005). The Einstein Dossiers: Science and Politics – Einstein's Berlin Period with an Appendix on Einstein's FBI File (translated by A
Fritz_Haber
American actress
role 1999 The Kids from Room 402 Nurse Pitts (voice) Episode: "Son of Einstein" The Brothers Flub Additional voices 2000 PB&J Otter Dr. Molar Fox (voice)
Lori_Alan
Magnetic property of ordinary materials
2011. Retrieved 26 September 2011. Kittel, Charles (1986). Introduction to Solid State Physics (6th ed.). John Wiley & Sons. pp. 299–302. ISBN 978-0-471-87474-4
Diamagnetism
Transport of dissolved species from the highest to the lowest concentration region
motion and the atomistic backgrounds of diffusion were developed by Albert Einstein. The concept of diffusion is typically applied to any subject matter involving
Diffusion
Russian theoretical physicist (1933–2022)
November 2022, the Bose-Einstein Condensation Center in Trento has been renamed after him as "Pitaevskii Center on Bose-Einstein Condensation", in honour
Lev_Pitaevskii
German physicist (1873–1916)
and astronomer. Schwarzschild provided the first exact solution to the Einstein field equations of general relativity, for the limited case of a single
Karl_Schwarzschild
EINSTEIN SOLID
EINSTEIN SOLID
Boy/Male
Muslim
Firm, Solid
Boy/Male
Tamil
Solid redemption
Boy/Male
Muslim
Strong, Solid, Firm, Sharp
Surname or Lastname
English
English : nickname, possibly for a small person, from Middle English pink, penk ‘minnow’ (Old English pinc).English (southeastern) : variant of Pinch.Variant spelling of German Pinck, an indirect occupational name for a blacksmith, an onomatopoeic word imitating the sound of hammering which was perceived as pink(e)pank.German (of Slavic origin) : from a diminutive of Sorbian pien ‘log’, ‘tree stump’, hence probably a nickname for a solid or stubby person.
Surname or Lastname
English
English : from an Old English personal name composed of the elements wynn ‘joy’ + stÄn ‘stone’.English : habitational name from any of various places called Winston or Winstone, from various Old English personal names + Old English tÅ«n ‘enclosure’, ‘settlement’, or, in the case of Winstone in Gloucestershire, Old English stÄn ‘stone’.Americanized form of Jewish Weinstein.
Boy/Male
Muslim
Solid structure
Boy/Male
Muslim
Strong, Powerful, Solid, Of
Boy/Male
Indian
Solid, Strong, Secure, Confident, Sure, Certain
Surname or Lastname
English
English : habitational name from any of various places called Burston, in Buckinghamshire, Norfolk, and Staffordshire, which have different origins. The Buckinghamshire place name is from an Old English personal name Briddel + Old English þorn ‘thorn tree’; the place in Norfolk is named with Old English byrst ‘rough ground’, ‘landslip’ + tÅ«n ‘farmstead’; the Staffordshire place name has the same second element, the first being an Old English personal name Burgwine or Burgwulf.English : possibly from an unrecorded Old English personal name, BurgstÄn.Jewish (American) : Americanized spelling of Burstein (see Bernstein).
Boy/Male
Muslim
Strong, Solid, Firm, Sharp
Surname or Lastname
English
English : unexplained.Possibly an Americanized spelling of French Imbert or a translation of German and Jewish Bernstein, which means ‘amber’.Muslim (widespread throughout the Muslim world) : from the Arabic personal name ‛Anbar, literally ‘perfume’, ‘ambergris’, figuratively ‘good’, ‘pleasant’, ‘agreeable’.
Girl/Female
Muslim
Firm, Solid, Determined
Boy/Male
Norse
Rock or hard spear.
Boy/Male
Norse
Lucky.
Boy/Male
Indian
Solid, Strong, Secure, Confident, Sure, Certain
Boy/Male
Muslim
Solid
Girl/Female
Indian
Strong, Solid
Girl/Female
Muslim
Strong, Solid
Girl/Female
Indian
Firm, Solid, Determined
Boy/Male
Norse
Lucky.
EINSTEIN SOLID
EINSTEIN SOLID
Boy/Male
Tamil
Bright
Girl/Female
Muslim
Safety
Surname or Lastname
English
English : from a short form of Herbert.Dutch : from a pet form of the Germanic personal name Herbrecht, composed of the elements hari, heri ‘army’ + berht ‘bright’, ‘illustrious’.
Girl/Female
Muslim
One who gives valuable advice
Girl/Female
Muslim/Islamic
Fruit Gifts
Boy/Male
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Lotus
Girl/Female
Arabic, Muslim
Light of the Faith
Boy/Male
Afghan, African, Arabic, Celebrity, French, German, Gujarati, Hebrew, Indian, Iranian, Kannada, Lebanese, Muslim, Parsi, Pashtun, Sindhi, Swahili, Turkish
Friend; Beloved One; Darling; Another Name for Prophet Muhammad
Surname or Lastname
English
English : variant of Cossey.Perhaps also an Americanized spelling of French Cossé (see Cosse).
Boy/Male
Tamil
Narang ca be used as a surname in various culture
EINSTEIN SOLID
EINSTEIN SOLID
EINSTEIN SOLID
EINSTEIN SOLID
EINSTEIN SOLID
a.
Having all the geometrical dimensions; cubic; as, a solid foot contains 1,728 solid inches.
a.
Capable of being solidified.
a.
Not hollow; full of matter; as, a solid globe or cone, as distinguished from a hollow one; not spongy; dense; hence, sometimes, heavy.
n.
The solid contents of a body; volume; amount of inclosed space.
n.
The doctrine that refers all diseases to morbid changes of the solid parts of the body. It rests on the view that the solids alone are endowed with vital properties, and can receive the impression of agents tending to produce disease.
v. t.
To make solid or firm.
n.
An advocate of, or believer in, solidism.
adv.
In a solid manner; densely; compactly; firmly; truly.
v. t.
To make solid or compact.
v. i.
To become solid; to harden.
imp. & p. p.
of Solidify
a.
Sound; not weakly; as, a solid constitution of body.
p. pr. & vb. n.
of Solidify
n.
The state or quality of being solid; density; consistency, -- opposed to fluidity; compactness; fullness of matter, -- opposed to openness or hollowness; strength; soundness, -- opposed to weakness or instability; the primary quality or affection of matter by which its particles exclude or resist all others; hardness; massiveness.
n.
Act of solidifying, or state of being solidified.
a.
Firm; compact; strong; stable; unyielding; as, a solid pier; a solid pile; a solid wall.
n.
State or quality of being solid; firmness; compactness; solidity, as of material bodies.
a.
United; without division; unanimous; as, the delegation is solid for a candidate.
n.
A work or structure of stone, brick, or other materials, raised to some height, and intended for defense or security, solid and permanent inclosing fence, as around a field, a park, a town, etc., also, one of the upright inclosing parts of a building or a room.
n.
Moral firmness; soundness; strength; validity; truth; certainty; -- as opposed to weakness or fallaciousness; as, the solidity of arguments or reasoning; the solidity of principles, triuths, or opinions.