viscosity

viscosity
[1] A measure of an oil's ability to pour or be thick. Every container of oil is marked with the viscosity of the oil. Straight weight (also called "single viscosity" or "single weight") oil has a single number like 30 weight. A lower number means the oil is thinner and is particularly good for lower temperatures. A higher number is better for hotter temperatures. Multigrade (also called "multiviscosity" or "multiweight") oil has two numbers like 10W40. When the temperature is low, a multigrade oil like 10W40 will act like a 10 weight oil; but when the temperature increases, it will act like a 40 weight. In this way, a multigrade oil is excellent for all-around driving.
[2] Comparative fluidity or stiffness of liquid adhesives, coatings, and sealers.
[3] Measurement of thickness of oil or its resistance to flow. Also see spraying viscosity

Dictionary of automotive terms. 2015.

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  • viscosity — [vis käs′ə tē] n. pl. viscosities [ME viscosite < ML viscositas] 1. the state or quality of being viscous 2. a) Physics the internal friction of a fluid which makes it resist flowing past a solid surface or other layers of the fluid: symbol, η …   English World dictionary

  • Viscosity — Vis*cos i*ty, n. [Cf. F. viscosit[ e], LL. viscositas.] 1. The quality or state of being viscous. [1913 Webster] 2. (Physics) A property possessed by a viscous fluid, being a resistance to the forces causing a fluid to flow, caused by… …   The Collaborative International Dictionary of English

  • viscosity — index adhesion (affixing) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • viscosity — (n.) early 15c., from O.Fr. viscosite or directly from M.L. viscositas, from L. viscosus (see VISCOUS (Cf. viscous)) …   Etymology dictionary

  • viscosity —  Viscosity  Вязкость   Свойство текучих тел (жидкостей и газов) оказывать сопротивление перемещению одной их части относительно другой. Одно из трёх явлений переноса. Вязкость твёрдых тел обладает рядом специфических особенностей и… …   Толковый англо-русский словарь по нанотехнологии. - М.

  • viscosity — ► NOUN (pl. viscosties) 1) the state of being viscous. 2) a quantity expressing the magnitude of internal friction in a fluid, as measured by the force per unit area resisting uniform flow …   English terms dictionary

  • Viscosity — For other uses, see Viscosity (disambiguation). Viscosity The substance above has lower viscosity than the substance below SI symbol: μ, η SI unit: Pa·s  …   Wikipedia

  • viscosity — /vi skos i tee/, n., pl. viscosities. 1. the state or quality of being viscous. 2. Physics. a. the property of a fluid that resists the force tending to cause the fluid to flow. b. the measure of the extent to which a fluid possesses this… …   Universalium

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