boundary layer

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noun Physics.

the portion of a fluid flowing past a body that is in the immediate vicinity of the body and that has a reduced flow due to the forces of adhesion and viscosity.

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Origin of boundary layer

First recorded in 1920–25

Words nearby boundary layer

bound, bound and determined to, boundary, Boundary Commission, boundary condition, boundary layer, boundary line, Boundary Peak, boundary rider, boundary value problem, bounded

How to use boundary layer in a sentence

From the amount of iridium found in the boundary layer, Walter Alvarez’s father Luis Alvarez, a Manhattan Project veteran and Nobel Prize-winning physicist, calculated the size of an asteroid that would be necessary to coat the globe in iridium.
The Mother of All Accidents - Issue 99: Universality|Sean B. Carroll|April 21, 2021|Nautilus

British Dictionary definitions for boundary layer

boundary layer

noun

the layer of fluid closest to the surface of a solid past which the fluid flows: it has a lower rate of flow than the bulk of the fluid because of its adhesion to the solid

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012