a large, ship-size air cushion vehicle operated over water.
noun 1. ACV (def 2).
- Surface epithelium
surface epithelium n. Epithelium covering the embryonic genital ridges and the gonads that develop from them. Also called germinal epithelium.
- Surface friction drag
noun 1. the part of the drag on a body moving through a fluid that is dependent on the nature of the surface of the body Also called skin friction
noun, Mathematics. 1. the limit, as the norm of the partition of a given surface into sections of area approaches zero, of the sum of the product of the areas times the value of a given function of three variables at some point on each section.