Webster's Online Dictionary
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Definition: DIFFUSIVITY

Part of Speech Definition
Noun 1. Tendency to become diffused; tendency, as of heat, to become equalized by spreading through a conducting medium.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Diffusivity" was first used in popular English literature: sometime before 1914. (references)

Specialty Definition: DIFFUSIVITY

Domain Definition
Aerospace 1: See water, soil. (references)
  2: A measure of the rate of diffusion of a substance, expressed as the diffusivity coefficient K. When K is constant, the diffusion equation is where q is the substance diffused; 2 is the Laplacian operator; and t is time. The diffusivity has dimensions of a length times a velocity; it varies with the property diffused, and for any given property it may be considered a constant or a function of temperature, space, etc., depending on the context. Also called coefficient of diffusion. See conductivity, kinematic viscosity, exchange coefficients. In the case of molecular diffusion the length dimension is the mean free path of the molecules. By analogy, in eddy diffusion, length becomes the mixing length. The coefficient is the called then eddy diffusivity, and is in general several orders of magnitude larger than the molecular diffusivity. (references)
Electrical Engineering The constant of proportionality in the diffusion laws, i. e. Fick's laws. Source: European Union. (references)
Health Of a reverberant sound field. The degree to which the directions of propagation of waves are random from point to point. (references)
Mining The relative rate of flow per unit area of a particular constituent of a mixture divided by the gradient of composition, temperature, or other property considered to be causing the diffusion. (references)
Physics Of a reverberant sound field. The degree to which the directions of propagation of waves are random from point to point. Source: European Union. (references)

Source: compiled by the editor from various references; see credits.

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Specialty Expressions: DIFFUSIVITY

Expressions Domain Definition
Eddy diffusivity coefficients Physics Coefficients of eddy flux(e. g. , of momentum, heat, water vapour, etc. )in turbulent flow, defined as the ratio of the rate of flux of a quantity to the mean gradient of the quantity in the direction of the flux. Source: European Union. (references)
Thermal diffusivity Military The rate at which temperature changes within a substance, expressed in centimeters squared per second per degree. (references)
Thermal diffusivity Physics Thermal conductivity divided by the product of specific heat times unit weight. Source: European Union. (references)
Thermal diffusivity of strata Mining See:thermal conductivity. (references)
Thermic diffusivity Electrical Engineering The quotient of the thermal conductivity of a body by the product of its specific heat capacity and its specific mass. Source: European Union. (references)

Source: compiled by the editor from various references; see credits.

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Topics by Level of Interest: DIFFUSIVITY

Topics sorted by level of Interest Level (1=low, 600=high)     Topics sorted Alphabetically Level (1=low, 600=high)
Thermal diffusivity 4     Diffusivity (biology) 2
Diffusivity (biology) 2     Thermal diffusivity 4

Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).

Translations: DIFFUSIVITY

Language Translations (or nearest inflections or synonyms, in parentheses)
Bohemian rozptylnost (diffusivity, dispersive power, dispersiveness), difuzivnost (diffusivity), prolínavost (diffusibility, diffusivity, diffusing power), difuzivita (diffusivity). Additional references: Bohemian, Czech Republic, diffusivity. (volunteer & more translations)
Brazilian Portuguese difusividade (diffusion, diffusivity), difusibilidade (diffusion coefficient, diffusion constant, diffusivity), constante de difusao (diffusion coefficient, diffusion constant, diffusivity). Additional references: Brazilian Portuguese, Portugal, Angola, diffusivity. (volunteer & more translations)
Central Danish diffusivitet (diffusivity), diffusitet (diffusion, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity), diffusionsevne (diffusivity). Additional references: Central Danish, Denmark, Germany, diffusivity. (volunteer & more translations)
Cestina rozptylnost (diffusivity, dispersive power, dispersiveness), difuzivnost (diffusivity), prolínavost (diffusibility, diffusivity, diffusing power), difuzivita (diffusivity). Additional references: Cestina, Czech Republic, diffusivity. (volunteer & more translations)
Croatian difuzivnost (diffusivity). Additional references: Croatian, Croatia, diffusivity. (volunteer & more translations)
Czech rozptylnost (diffusivity, dispersive power, dispersiveness), difuzivnost (diffusivity), prolínavost (diffusibility, diffusivity, diffusing power), difuzivita (diffusivity). Additional references: Czech, Czech Republic, diffusivity. (volunteer & more translations)
Danish diffusivitet (diffusivity), diffusitet (diffusion, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity), diffusionsevne (diffusivity). Additional references: Danish, Denmark, Germany, diffusivity. (volunteer & more translations)
Dansk diffusivitet (diffusivity), diffusitet (diffusion, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity), diffusionsevne (diffusivity). Additional references: Dansk, Denmark, Germany, diffusivity. (volunteer & more translations)
Dutch diffusiteit (diffusion, diffusivity), diffusieconstante (diffusion coefficient, diffusion constant, diffusivity), diffusiecoefficient (diffusion coefficient, diffusion constant, diffusivity). Additional references: Dutch, Netherlands, Aruba, diffusivity. (volunteer & more translations)
Finnish diffuusiokyky (Diffusivity), diffuusius (diffusion, diffusivity), diffuusiovakio (diffusion coefficient, diffusion constant, diffusivity, value P is inversely proportional to the diffusion constant). Additional references: Finnish, Finland, Russia (Europe), diffusivity. (volunteer & more translations)
Français diffusivité (diffusivity, diffusion), capacité de diffusion (diffusivity, diffusing capacity, hole storage effect, transfer factor), diffusivite (diffusivity), diffusibilité (diffusibility, diffusivity), constante de diffusion (constant of diffusion, diffusion constant, distribution constant, diffusion coefficient, diffusivity), coefficient de diffusion (diffusion coefficient, diffusion constant, diffusion factor, mass diffusivity, scattering coefficient). Additional references: Français, France, Algeria, diffusivity. (volunteer & more translations)
French diffusivité (diffusivity, diffusion), capacité de diffusion (diffusivity, diffusing capacity, hole storage effect, transfer factor), diffusivite (diffusivity), diffusibilité (diffusibility, diffusivity), constante de diffusion (constant of diffusion, diffusion constant, distribution constant, diffusion coefficient, diffusivity), coefficient de diffusion (diffusion coefficient, diffusion constant, diffusion factor, mass diffusivity, scattering coefficient). Additional references: French, France, Algeria, diffusivity. (volunteer & more translations)
Greek συντελεστής διάχυσης (coefficient of thermometric conductivity, diffusion coefficient, diffusion constant, diffusivity, temperature conductivity), συντελεστής διαχύσεως (diffusion coefficient, diffusion constant, diffusivity), σταθερά διάχυσης (diffusion coefficient, diffusion constant, diffusivity), βαθμός διάχυσης πεδίου (diffusion, diffusivity), ικανότης διαχύσεως (diffusivity), διάχυση (effusion, diffusion, diffusivity, interfusion, permeation), διαχυτότητα (diffusivity). Additional references: Greek, Greece, Albania, diffusivity. (volunteer & more translations)
Greek (transliteration) sindelestis dhiakhisis (coefficient of thermometric conductivity, diffusion coefficient, diffusion constant, diffusivity, temperature conductivity), sindelestis dhiakhuseos (diffusion coefficient, diffusion constant, diffusivity), stathera dhiakhisis (diffusion coefficient, diffusion constant, diffusivity), vathmos dhiakhisis pedhioi (diffusion, diffusivity), ikanotis dhiakhuseos (diffusivity), dhiakhisi (effusion, diffusion, diffusivity, interfusion, permeation), dhiakhitotita (diffusivity). Additional references: Greek, Greece, Albania, diffusivity. (volunteer & more translations)
Hungarian diffundálóképesség (diffusivity). Additional references: Hungarian, Hungary, Austria, diffusivity. (volunteer & more translations)
Italian diffusività (diffusivity), coefficiente di diffusivita (diffusivity coefficient), equazione di diffusivita (diffusivity equation). Additional references: Italian, Italy, Croatia, diffusivity. (volunteer & more translations)
Japanese 拡散率 (diffusivity, spreading factor), 温度拡散率 (Thermal diffusivity). Additional references: Japanese, Japan, Taiwan, diffusivity. (volunteer & more translations)
Magyar diffundálóképesség (diffusivity). Additional references: Magyar, Hungary, Austria, diffusivity. (volunteer & more translations)
Portuguese difusividade (diffusion, diffusivity), difusibilidade (diffusion coefficient, diffusion constant, diffusivity), constante de difusao (diffusion coefficient, diffusion constant, diffusivity). Additional references: Portuguese, Portugal, Angola, diffusivity. (volunteer & more translations)
Ruotsi diffusivitet (diffusion, diffusion coefficient, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity). Additional references: Ruotsi, Sweden, Finland, diffusivity. (volunteer & more translations)
Russian диффузность (diffusivity), температуропроводность (thermal diffusivity), уравнение диффузии (diffusivity equation), коэффициент пьезопроводимости (diffusivity coefficient). Additional references: Russian, Russia, China, diffusivity. (volunteer & more translations)
Russian (transliteration) diffuznostʹ (diffusivity), temperaturoprovodnostʹ (thermal diffusivity), uravnenie diffuzii (diffusivity equation), koeffitsient pʹezoprovodimosti (diffusivity coefficient). Additional references: Russian, Russia, China, diffusivity. (volunteer & more translations)
Russki диффузность (diffusivity), температуропроводность (thermal diffusivity), уравнение диффузии (diffusivity equation), коэффициент пьезопроводимости (diffusivity coefficient). Additional references: Russki, Russia, China, diffusivity. (volunteer & more translations)
Russki (transliteration) diffuznostʹ (diffusivity), temperaturoprovodnostʹ (thermal diffusivity), uravnenie diffuzii (diffusivity equation), koeffitsient pʹezoprovodimosti (diffusivity coefficient). Additional references: Russki, Russia, China, diffusivity. (volunteer & more translations)
Serbian (transliteration) sinonim za difuzioni koeficije (diffusivity), difuzivnost (diffusivity). Additional references: Serbian (transliteration), diffusivity. (volunteer & more translations)
Sjaelland diffusivitet (diffusivity), diffusitet (diffusion, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity), diffusionsevne (diffusivity). Additional references: Sjaelland, Denmark, Germany, diffusivity. (volunteer & more translations)
Slovak rozptylnosť (diffusivity, dispersive power), difuzivita (diffusivity). Additional references: Slovak, Slovakia, Hungary, diffusivity. (volunteer & more translations)
Slovakian rozptylnosť (diffusivity, dispersive power), difuzivita (diffusivity). Additional references: Slovakian, Slovakia, Hungary, diffusivity. (volunteer & more translations)
Spanish difusividad (diffusion, diffusion coefficient, diffusion constant, diffusivity), difusibilidad (diffusibility, diffusivity). Additional references: Spanish, Spain, Mexico, diffusivity. (volunteer & more translations)
Suomea diffuusiokyky (Diffusivity), diffuusius (diffusion, diffusivity), diffuusiovakio (diffusion coefficient, diffusion constant, diffusivity, value P is inversely proportional to the diffusion constant). Additional references: Suomea, Finland, Russia (Europe), diffusivity. (volunteer & more translations)
Suomi diffuusiokyky (Diffusivity), diffuusius (diffusion, diffusivity), diffuusiovakio (diffusion coefficient, diffusion constant, diffusivity, value P is inversely proportional to the diffusion constant). Additional references: Suomi, Finland, Russia (Europe), diffusivity. (volunteer & more translations)
Svenska diffusivitet (diffusion, diffusion coefficient, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity). Additional references: Svenska, Sweden, Finland, diffusivity. (volunteer & more translations)
Swedish diffusivitet (diffusion, diffusion coefficient, diffusivity), diffusionskonstant (diffusion coefficient, diffusion constant, diffusivity), diffusionskoefficient (diffusion coefficient, diffusion constant, diffusivity). Additional references: Swedish, Sweden, Finland, diffusivity. (volunteer & more translations)
Source: Eve, based on a combination of meta analysis and graph theory (for near and back translations). Top

Constructed Language Translations: DIFFUSIVITY

Language Translations for “diffusivity” or closest synonym(s); back translations in parentheses.
Athag dathagiffathagusathagivathagityathag (diffusivity). Additional references: Athag, diffusivity. (volunteer)
Double Dutch dagiffagusagivagityag (diffusivity). Additional references: Double Dutch, diffusivity. (volunteer)
Leet [)¦|><~>|><~>(_)z¦\/¦7\-/ (diffusivity). Additional references: Leet, diffusivity. (volunteer)
Oppish dopiffopusopivopityop (diffusivity). Additional references: Oppish, diffusivity. (volunteer)
Pig Latin iffusivityday (diffusivity). Additional references: Pig Latin, diffusivity. (volunteer)
Terran B diffusiinseon (diffusivity). Additional references: Terran B, diffusivity. (volunteer)
Ubbi Dubbi dubiffubusubivubityub (diffusivity). Additional references: Ubbi Dubbi, diffusivity. (volunteer)
Source: compiled by the editor. Top