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Proportionality constant in some physical laws
Diffusivity, mass diffusivity or diffusion coefficient is usually written as the proportionality constant between the molar flux due to molecular diffusion
Mass_diffusivity
Index of articles associated with the same name
different mediums. Diffusivity may refer to: Thermal diffusivity, diffusivity of heat Diffusivity of mass: Mass diffusivity, molecular diffusivity (often called
Diffusivity
Ratio of a fluid's kinematic viscosity to mass diffusivity
is the ratio of the shear component for diffusivity (viscosity divided by density) to the diffusivity for mass transfer D. It physically relates the relative
Schmidt_number
Dimensionless quantity related to transient heat conduction
can also be used in the study of mass diffusion, in which the thermal diffusivity is replaced by the mass diffusivity. The Fourier number is used in analysis
Fourier_number
Ratio of thermal diffusivity to mass diffusivity
ratio of thermal diffusivity to mass diffusivity. It is used to characterize fluid flows where there is simultaneous heat and mass transfer. The Lewis
Lewis_number
Rate at which heat spreads throughout a material
Thermal diffusivity and thermal effusivity are related concepts and quantities used to simulate non-equilibrium thermodynamics. Diffusivity is the more
Thermal_diffusivity
Understanding of gas properties in terms of molecular motion
as transport properties such as viscosity, thermal conductivity and mass diffusivity. The basic version of the model describes an ideal gas. It treats the
Kinetic_theory_of_gases
Length scale used in fluid dynamics
kinematic viscosity. D is the mass diffusivity. ε is the rate of dissipation of turbulence kinetic energy per unit mass. Similar to the Kolmogorov microscales
Batchelor_scale
Parameter in plasma physics
number (i.e. a nonzero magnetic diffusivity) is associated with violation of Alfvén's theorem. The magnetic diffusivity has SI units of m2/s and is defined
Magnetic_diffusivity
Penetration of a liquid, gas, or vapor through a solid
permeate, a material's intrinsic permeability, and the materials' mass diffusivity. Permeation is modeled by equations such as Fick's laws of diffusion
Permeation
Dimensionless parameter in fluid mechanics
mass transfer the Prandtl number is replaced by the Schmidt number, Sc, which expresses the ratio of the momentum diffusivity to the mass diffusivity
Graetz_number
Resistance of a fluid to shear deformation
the mass and heat fluxes, and D {\displaystyle D} and k t {\displaystyle k_{t}} are the mass diffusivity and thermal conductivity. The fact that mass, momentum
Viscosity
Particle behavior in systems of length less than the mean free path
SI units), molar mass M A {\displaystyle M_{A}} is expressed in units of kg/mol, and temperature T (in kelvins). Knudsen diffusivity D K A {\displaystyle
Knudsen_diffusion
Combination of the diffusion and convection (advection) equations
concentration for mass transfer, temperature for heat transfer), D is the diffusivity (also called diffusion coefficient), such as mass diffusivity for particle
Convection–diffusion_equation
Ratio of kinematic viscosity to thermal diffusivity
dynamicist Ludwig Prandtl. It is defined as the ratio of momentum diffusivity to thermal diffusivity. The Prandtl number is a ratio of physical properties that
Prandtl_number
Exchange of mass, energy, and momentum between observed and studied systems
transfer, the comparison is between viscous diffusivity ( ν {\displaystyle {\nu }} ) and mass Diffusivity ( D {\displaystyle {D}} ), given by the Schmidt
Transport_phenomena
it to expand in all directions without rupture. Mass diffusivity: Ability of one substance to diffuse through another Plasticity: Ability of a material
List_of_materials_properties
Random motion of particles suspended in a fluid
probability of displacement q {\displaystyle q} , is interpreted as mass diffusivity D: D = ∫ − ∞ ∞ q 2 2 τ φ ( q ) d q . {\displaystyle D=\int _{-\infty
Brownian_motion
Dimensionless number in fluid mechanics
{\mbox{Total mass transfer rate}}{\mbox{Diffusion rate}}}} where L is a characteristic length (m) D is mass diffusivity (m2 s−1) h is the convective mass transfer
Sherwood_number
Ratio of the thermal resistances of a body's interior to its surface
{k_{c}}} : convective mass transfer coefficient (analogous to the h of the heat transfer problem) D {\displaystyle D} : mass diffusivity (analogous to the
Biot_number
Mixing of fluids due to eddy currents
now neglect the molecular diffusivity K 0 {\textstyle K_{0}} , since it is usually significantly smaller than eddy diffusivity, and would steer attention
Eddy_diffusion
Body of interstellar clouds
cubic centimeter) – a nebular cloud the size of the Earth would have a total mass of only a few kilograms. Earth's air has a density of approximately 1019
Nebula
Mass diffusivity of a chemical species without a chemical potential gradient
Self-diffusion describes the diffusive motions of molecules within themselves e.g. the movement of a water molecule in water. According to the IUPAC definition
Self-diffusion
Layer of fluid in the immediate vicinity of a bounding surface
momentum diffusivity. In the energy balance this is replaced by thermal diffusivity α = k / ρ C P {\displaystyle \alpha ={k/\rho C_{P}}} , and by mass diffusivity
Boundary_layer
Net transport of atoms through a solid
diffusion occurs much faster than lattice diffusion. Kirkendall effect Mass diffusivity Heitjans, P.; Karger, J., eds. (2005). Diffusion in condensed matter:
Atomic_diffusion
Ratio of a fluid's advective and diffusive transport rates
rate diffusive transport rate . {\displaystyle \mathrm {Pe} ={\dfrac {\text{advective transport rate}}{\text{diffusive transport rate}}}.} For mass transfer
Péclet_number
Diffusion coefficient through the pore space of a porous media
become significant below ~0.4 Tmelt in FCC metals. Kirkendall effect Mass diffusivity P. Heitjans, J. Karger, Ed, “Diffusion in condensed matter: Methods
Effective diffusion coefficient
Effective_diffusion_coefficient
numbers in transport phenomena of mass, momentum, and energy are principally analyzed by the ratio of effective diffusivities in each transport mechanism.
Dimensionless numbers in fluid mechanics
Dimensionless_numbers_in_fluid_mechanics
term defined as the ratio between the momentum eddy diffusivity and the heat transfer eddy diffusivity. It is useful for solving the heat transfer problem
Turbulent_Prandtl_number
Dimensionless number in fluid dynamics
thermal diffusivity The Be number plays in forced convection the same role that the Rayleigh number plays in natural convection. In the context of mass transfer
Bejan_number
Equation used to calculate the electromigration of ions in a fluid
{E}}} _{\text{Electromigration}}} where D {\displaystyle D} is the diffusivity of the chemical species, z {\displaystyle z} is the valence of ionic
Nernst–Planck_equation
Diffusion coefficient of a diffusant along a grain boundary
boundary is represented as a thin layer of high-diffusivity uniform and isotropic slab embedded in a low-diffusivity isotropic crystal. Suppose that the thickness
Grain boundary diffusion coefficient
Grain_boundary_diffusion_coefficient
Type of process for separating isotopes
caused by the effects of the mass of an isotope on atomic or molecular velocities, diffusivities or bond strengths. Mass-independent fractionation processes
Mass-independent fractionation
Mass-independent_fractionation
}}}} [citation needed] where α {\displaystyle \alpha } is the thermal diffusivity of the material (m2s−1), Ω {\displaystyle \Omega } is the external angular
Thermal_lag
Dimensionless quantity associated with free convection of a fluid
(Pr), which describes the relationship between momentum diffusivity and thermal diffusivity: Ra = Gr × Pr. Hence it may also be viewed as the ratio of
Rayleigh_number
Aerodynamic surface
the inlet, so for the conservation of mass principle the air flow will have a much bigger speed at the diffuser inlet and as a consequence under the whole
Diffuser_(automotive)
Highly aggressive brain tumor, mostly found in children
Nejo T, Lulla RR, et al. (December 2020). "Mass cytometry detects H3.3K27M-specific vaccine responses in diffuse midline glioma". The Journal of Clinical
Diffuse_midline_glioma
Type of blood cancer
mass or tissue infiltration that is sometimes associated with systemic B symptoms (e.g. fever, weight loss, and night sweats). The causes of diffuse large
Diffuse_large_B-cell_lymphoma
Distance a flow travels after entering a pipe before fully developed
number is the dimensionless number for the ratio of momentum diffusivity to thermal diffusivity. The thermal entrance length for a fluid with a Prandtl number
Entrance length (fluid dynamics)
Entrance_length_(fluid_dynamics)
Type of transistor
A diffused junction transistor is a transistor formed by diffusing dopants into a semiconductor substrate. The diffusion process was developed later than
Diffused_junction_transistor
Transport of dissolved species from the highest to the lowest concentration region
molecule diffusing through the pore. Under this condition, the collision with the pore walls becomes gradually more likely and the diffusivity is lower
Diffusion
Atomic diffusion within a crystalline lattice
B, respectively. Kirkendall effect Phase transformations in solids Mass diffusivity P. Heitjans, J. Karger, Ed, “Diffusion in condensed matter: Methods
Lattice_diffusion_coefficient
Weapon that can kill many people or cause great damage
A weapon of mass destruction (WMD) is a biological, chemical, radiological, nuclear, or any other weapon that can kill or significantly harm many people
Weapon_of_mass_destruction
Thermodynamic device
Bernoulli's principle Compressible flow Duct (flow) Mass flow rate Air conditioning ASHRAE SMACNA Nozzle "diffuser". Merriam–Webster Dictionary. Retrieved 5 August
Diffuser_(thermodynamics)
Earth's most severe extinction event
species. It is also the greatest known mass extinction of insects. It is the greatest of the "Big Five" mass extinctions of the Phanerozoic. There is
Permian–Triassic extinction event
Permian–Triassic_extinction_event
Thermal motion of liquid or gas particles at temperatures above absolute zero
N_{A}=-D_{AB}{\frac {dC_{A}}{dx}}} (only applicable for no bulk motion) where D is the diffusivity of A through B, proportional to the average molecular velocity and, therefore
Molecular_diffusion
Lab technique
raffinate and strip product is differentiated. With a typical liquid mass diffusivity in the order of 10−9 m2/s, the characteristic time for diffusion through
Thin_layer_extraction
Extremely low luminosity galaxy
An ultra diffuse galaxy (UDG), or dark galaxy, is an extremely low luminosity galaxy, the first example of which was discovered in the nearby Virgo Cluster
Ultra_diffuse_galaxy
and gravitationally scattered outwards, or the planet and star could be a mass-imbalanced wide binary system with the planet being the primary object of
Exoplanet orbital and physical parameters
Exoplanet_orbital_and_physical_parameters
Phenomenon in fluid dynamics
s−1) Y F {\displaystyle Y_{F}} Fuel mass fraction in the gas film (-) D {\displaystyle {\mathcal {D}}} Mass diffusivity (m2.s−1) h g {\displaystyle h_{g}}
Droplet_vaporization
Medical imaging technique
size and mass effect of the left thyroid infiltrative mass, with almost complete resolution of the left cervical lymphadenopathy. Fig. 12. Diffuse thyroid
Computed tomography of the thyroid
Computed_tomography_of_the_thyroid
Parameter for diffusion and fluid flow in porous media
space to the diffusivity in the porous medium (analogous to arc-chord ratio of path). Strictly speaking, however, the effective diffusivity is proportional
Tortuosity
Net movement of mass from one location, phase, etc. to another
processes that involve diffusive and convective transport of chemical species within physical systems. Some common examples of mass transfer processes are
Mass_transfer
Type of bipolar junction transistor
early 1960s, with the introduction of the planar transistor which could be mass-produced easily while alloy-junction transistors had to be made individually
Alloy-junction_transistor
Ejecta from the Sun's corona
A coronal mass ejection (CME) is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar
Coronal_mass_ejection
Measuring timescales and/or temperatures of thermal events in the history of rock
the maximum diffusivity at infinite temperature; also known as the pre-exponential factor (m2 s−1) EA is the activation energy for diffusivity (J mol−1)
Geospeedometry
Mathematical relationship describing the flow of groundwater through an aquifer
storage (Ss), puts hydraulic diffusivity (α = K/Ss or equivalently, α = T/S) on the right hand side. The hydraulic diffusivity is proportional to the speed
Groundwater_flow_equation
First textbook about transport phenomena
Macroscopic Balances for Nonisothermal Systems Mass transport Diffusivity and the Mechanisms of Mass Transport Concentration Distributions in Solids
Transport_Phenomena_(book)
Measurement of capacity of a material to conduct heat
temperature vs. time response in the sensor, the thermal conductivity, thermal diffusivity and specific heat capacity of the material can be calculated. For highly
Thermal conductivity measurement
Thermal_conductivity_measurement
Medical condition
indicated to reduce secondary injury. Although diffuse axonal injury often lacks a surgically remediable mass lesion, raised intracranial pressure can occur
Diffuse_axonal_injury
X-ray optics design that mimics the structure of lobster eyes
STORM/DXL instrument (Sheath Transport Observer for the Redistribution of Mass/Diffuse X-ray emission from the Local galaxy) had micropore reflectors arranged
Lobster-eye_optics
September 2, 2025 A resolution honoring the victims and survivors of the mass shooting at the Annunciation Catholic Church and School in Minneapolis, Minnesota
List of bills in the 119th United States Congress
List_of_bills_in_the_119th_United_States_Congress
Type of wind turbine
A diffuser-augmented wind turbine (DAWT) is a wind turbine modified with a cone-shaped wind diffuser that is used to increase the efficiency of converting
Diffuser-augmented wind turbine
Diffuser-augmented_wind_turbine
Movement of rock or soil down slopes
Mass wasting, also known as mass movement, is a general term for the movement of rock or soil down slopes under the force of gravity. It differs from other
Mass_wasting
Hematologic cancer that affects lymphocytes
cytoplasm without granules TdT, CD2, CD7 It often presents as a mediastinal mass because of involvement of the thymus. It is highly associated with NOTCH1
Lymphoma
Elementary particle with extremely low mass
electrically neutral and because its rest mass is so small (-ino) that it was long thought to be zero. The rest mass of the neutrino is much smaller than that
Neutrino
Book by Mancur Olson
concentrated benefits versus diffuse costs. Its central argument is that concentrated minor interests will be overrepresented and diffuse majority interests trumped
The Logic of Collective Action
The_Logic_of_Collective_Action
Partial differential equation describing the evolution of temperature in a region
dimension, with diffusivity coefficient α = k c ρ {\displaystyle \alpha ={\frac {k}{c\rho }}} This quantity is called the thermal diffusivity of the medium
Heat_equation
State of matter
that are commonly used as supercritical fluids. Table 2 shows density, diffusivity and viscosity for typical liquids, gases and supercritical fluids. Also
Supercritical_fluid
Column of one fluid moving through another
the mass released at time t = t 0 {\displaystyle t=t_{0}} and location x = x 0 {\displaystyle x=x_{0}} , and D {\displaystyle D} is the diffusivity in
Plume_(fluid_dynamics)
Online crime fandom
obsessive interest in true crime, particularly serial killers and high-profile mass murderers. The TCC comprises individuals who engage with true crime podcasts
True_Crime_Community
Barred spiral galaxy in the Local Group
virial mass of the Andromeda Galaxy is of the same order of magnitude as that of the Milky Way, at 1 trillion solar masses (2.0×1042 kilograms). The mass of
Andromeda_Galaxy
Method of utilizing water in magnetic resonance imaging
The diffusivity along the principal axis, λ1 is also called the longitudinal diffusivity or the axial diffusivity or even the parallel diffusivity λ∥.
Diffusion-weighted magnetic resonance imaging
Diffusion-weighted_magnetic_resonance_imaging
Motion characterized by chaotic changes in pressure and flow velocity
enhanced mixing and increased rates of mass, momentum and energy transports in a flow is called "diffusivity". Turbulent diffusion is usually described
Turbulence
Mathematical descriptions of molecular diffusion
first reported his now well-known laws governing the transport of mass through diffusive means. Fick's work was inspired by the earlier experiments of Thomas
Fick's_laws_of_diffusion
Equation in stellar astrophysics
In astrophysics, the mass–luminosity relation is an empirical and theoretical relationship between a star's mass and its luminosity The relationship is
Mass–luminosity_relation
Dimensionless parameter in fluid mechanics
total heat transfer at the wall (due to thermal diffusivity). Using the heat-mass transfer analogy, a mass transfer St equivalent can be found using the
Stanton_number
This article is a list of mass shootings in Belgium. Mass shootings are firearm-related violence with at least four casualties. The data includes casualties
List of mass shootings in Belgium
List_of_mass_shootings_in_Belgium
Amount of atmosphere that sunlight must pass through
The air mass coefficient defines the direct optical path length through the Earth's atmosphere, expressed as a ratio relative to the path length vertically
Air_mass_(solar_energy)
method is that complex samples that cannot diffuse through the membrane are not incorporated into the mass spectroscopic measurements, highlighting the
Membrane-introduction mass spectrometry
Membrane-introduction_mass_spectrometry
Aeration device
An air diffuser or membrane diffuser is an aeration device typically in the shape of a disc, tube or plate, which is used to transfer air and with that
Diffuser_(sewage)
Projection X-ray of the chest
shadow ascending vertically and clinging to the ribs. The differential for diffuse shadowing is very broad and can defeat even the most experienced radiologist
Chest_radiograph
Hypothetical invisible cosmic material
dark matter constitutes 85% of the total mass, while dark energy and dark matter constitute 95% of the total mass–energy content. While the density of dark
Dark_matter
Material deformation mechanism
{b}{d}}\right)}^{p}} G is the shear modulus. The diffusivity is obtained form the tracer diffusivity, D ∗ {\displaystyle D^{*}} . The dimensionless constant
Nabarro–Herring_creep
Galaxy in constellation Coma Berenices
an ultra diffuse galaxy in the Coma Cluster. This galaxy is well-known because observations of the velocity dispersion in 2016 suggested a mass of about
Dragonfly_44
Fifth planet from the Sun
giant with a mass nearly 2.5 times that of all the other planets in the Solar System combined and slightly less than one-thousandth the mass of the Sun
Jupiter
Mass media in Somalia includes various radio, television, print and internet outlets. The federal government operates two official radio and TV networks
Mass_media_in_Somalia
Medical condition
Primary testicular diffuse large B-cell lymphoma (PT-DLBCL), also termed testicular diffuse large B-cell lymphoma and diffuse large B-cell lymphoma of
Primary testicular diffuse large B-cell lymphoma
Primary_testicular_diffuse_large_B-cell_lymphoma
Explains movement of sap through the phloem of plants
The pressure flow hypothesis, also known as the mass flow hypothesis, is the best-supported theory to explain the movement of sap through the phloem of
Pressure_flow_hypothesis
Ratio of mass-flux of chemical species to total mass flux
The mass-flux fraction (or Hirschfelder-Curtiss variable or Kármán-Penner variable) is the ratio of mass-flux of a particular chemical species to the total
Mass-flux_fraction
Ultra diffuse galaxy in the constellation Cetus
NGC 1052-DF2 is an ultra diffuse galaxy (UDG) identified in a wide-field imaging survey of the NGC 1052 group by the Dragonfly Telephoto Array. It has
NGC_1052-DF2
properties. "Specific" properties are expressed on a per mass basis. If the units were changed from per mass to, for example, per mole, the property would remain
List of thermodynamic properties
List_of_thermodynamic_properties
Flat, horizontal concrete element of modern buildings
related to thermal diffusivity, heat capacity and insulation. Concrete has low thermal diffusivity, high heat capacity, and its thermal mass is negatively
Concrete_slab
Rare human genetic lysosomal storage disorder
extended) are also diagnosed. MRI is accurate in accessing left ventricular mass and thickness and hypertrophy. Late gadolinium enhancement shows an increased
Fabry_disease
Type of interstellar cloud that obscures visible light
Herbig Ae/Be star Herbig–Haro object Theoretical concepts Accretion Initial mass function Jeans instability Kelvin–Helmholtz mechanism Nebular hypothesis
Dark_nebula
Problem-solving method in electrostatics
possible. If as time elapses, a mass approaches the boundary, then an image can appropriately describe the reflection of that mass back across the boundary.
Method_of_images
Proposed asteroid mission
below the surface, and potentially allowed the measurement of thermal diffusivity between the interior and the surface. Measurements should be done by
Clementine_2
Mechanics concept
of the rotational diffusion constants can give insight into the overall mass and its distribution within an object. Quantitatively, the mean square of
Rotational_diffusion
Empirical thermodynamic model of gas-transport phenomenon
uranium-235 isotope. Second example: An unknown gas diffuses 0.25 times as fast as He. What is the molar mass of the unknown gas? Using the formula of gaseous
Graham's_law
Star at the centre of the Solar System
Earth. The Sun's mass is around 330,000 times that of Earth, making up about 99.86% of the total mass of the Solar System. The mass of the Sun's surface
Sun
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MASS DIFFUSIVITY
MASS DIFFUSIVITY
Surname or Lastname
German and Dutch
German and Dutch : from a pet form of the personal name Thomas.English : unexplained.
Surname or Lastname
English
English : from the medieval female personal name Cass, a short form of Cassandra. This was the name (of uncertain, possibly non-Greek, origin) of an ill-fated Trojan prophetess of classical legend, condemned to foretell the future but never be believed; her story was well known and widely popular in medieval England.
Surname or Lastname
English and Welsh
English and Welsh : from the personal name Moss, a Middle English vernacular form of the Biblical name Moses.English and Scottish : topographic name for someone who lived by a peat bog, Middle English, Old English mos, or a habitational name from a place named with this word. (It was not until later that the vocabulary word came to denote the class of plants characteristic of a peat-bog habitat, under the influence of the related Old Norse word mosi.)Americanized form of Moses or some other like-sounding Jewish surname.Irish (Ulster) : part translation of Gaelic Ó Maolmhóna ‘descendant of Maolmhóna’, a personal name composed of the elements maol ‘servant’, ‘tonsured one’, ‘devotee’ + a second element which was assumed to be móin (genitive móna) ‘moorland’, ‘peat bog’.
Surname or Lastname
English
English : variant of Marsh.French : habitational name from places so named in Ardèche, Ardennes, Gard, Loire, Nièvre, and Meurthe-et-Moselle, from the Latin personal name Marcius, used adjectivally.French : from the personal name Meard, Mard, Mart, vernacular forms of the saint’s name Médard. Morlet notes that there are a number of places called Saint-Mars, formerly recorded in Latin as Sanctus Medardus.French : from the name of the month, mars ‘ March’, denoting seed sown in March, and hence a metonymic name for an arable grower.French (De Mars) : habitational name from Mars in the Ardennes.Dutch : from a short form of the personal name Marsilius.
Male
Hebrew
(מַשָׂ×) Hebrew name MASSA means "burden." In the bible, this is the name of a son of Ishmael.
Female
Japanese
(1-æ£, 2-é›…, 3-昌, 4-真, 5-政, 6-å°†) Unisex short form of Japanese names beginning with Masa-, MASA means 1) "correct, just," 2) "elegant," 3) "flourishing, prosperous" 4) "genuine, true," 5) "governing, political," 6) "military." Compare with strictly masculine Masa.
Female
English
English short form of Latin Cassandra, CASS means "she who entangles men."Â
Male
Swedish
Norwegian and Swedish form of Greek Mattathias, MATS means "gift of God."
Male
Japanese
(1-æ£, 2-é›…, 3-昌, 4-真, 5-政, 6-å°†) Unisex short form of Japanese names beginning with Masa-, MASA means 1) "correct, just," 2) "elegant, splendid" 3) "flourishing, prosperous" 4) "genuine, true," 5) "governing, political," 6) "military." Compare with another form of Masa.
Male
Hebrew
 Medieval Jewish form of Hebrew Moshe, MOSS means "drawn out." Compare with another form of Moss.
Male
English
 English surname transferred to forename use, derived from medieval Jewish Moss (2), MOSS means "drawn out." Compare with another form of Moss.
Boy/Male
Arabic, Muslim, Pashtun
Gul - Flowers; Mast - Excitement
Surname or Lastname
English
English : variant of Mace 1.French (Picardy) : metonymic occupational name from masse ‘mace’, ‘hammer’.French : habitational name from places called Masse (Allier and Cô-d’Or), or La Masse (Eure, Lot, Puy-de-Dôme, Saône-et-Loire).French (Massé) : habitational name from a place called Massé in Maine-et-Loire, so named from Gallo-Roman Macciacum (from the personal name Maccius + the locative suffix -acum).Dutch : from Middle Dutch masse ‘clog’; ‘cudgel’, perhaps a metonymic occupational name for someone who wielded a club.Dutch : possibly a variant of Maas 1, or a patronymic from Mas.
Male
Italian
Short form of Italian Tommaso, MASO means "twin."
Surname or Lastname
English
English : status name denoting a serf, Middle English, Old French vass(e), from Late Latin vassus, of Celtic origin. Compare Welsh gwas ‘boy’, Gaelic foss ‘servant’.English : variant of Vause.Swedish : variant of Wass.South German : variant of Fass.Hungarian : from vas ‘iron’, hence a metonymic occupational name for a blacksmith, or a nickname for a resilient, tough man.
Surname or Lastname
English
English : variant of Marsh.Americanized spelling of German Masch.Jewish (Ashkenazic) : unexplained; possibly an acronymic name.
Male
Hebrew
(מַשָׂ×) Variant spelling of Hebrew Massa, MASA means "burden." Compare with another form of Masa.
Surname or Lastname
English
English : from Old French bas(se) ‘low’, ‘short’ (Latin bassus ‘thickset’; see Basso), either a descriptive nickname for a short person or a status name meaning ‘of humble origin’, not necessarily with derogatory connotations.English : in some instances, from Middle English bace ‘bass’ (the fish), hence a nickname for a person supposedly resembling this fish, or a metonymic occupational name for a fish seller or fisherman.Scottish : habitational name from a place in Aberdeenshire, of uncertain origin.Jewish (Ashkenazic) : metonymic occupational name for a maker or player of bass viols, from Polish, Ukrainian, and Yiddish bas ‘bass viol’.German : see Basse.
Surname or Lastname
English
English : from a pet form of the medieval personal name Pascal, which was brought to England from France.German : topographic name from Pass ‘pass’, ‘passage’ (from Middle Low German pas ‘pace’, ‘passage way’, ‘water gauge’).Jewish (Ashkenazic) : metonymic occupational name or nickname from Yiddish and Polish pas ‘belt’, ‘girdle’.
Surname or Lastname
English
English : patronymic from the personal name May (see May).
MASS DIFFUSIVITY
MASS DIFFUSIVITY
MASS DIFFUSIVITY
MASS DIFFUSIVITY
MASS DIFFUSIVITY
MASS DIFFUSIVITY
MASS DIFFUSIVITY
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