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boundary layer
bound·a·ry lay·er (plural bound·a·ry lay·ers)


noun 
Definition:
 
fluid region closest to moving solid: the region of a viscous fluid such as air or water that is closest to the surface of a solid moving relative to the fluid
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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