verb (used with object), con·caved, con·cav·ing.
Origin of concave
Examples from the Web for concave
Shell flat, funnel-shaped, nearly discoidal, with concave outlines.
When a radial face or surface is convex, it is said to be rounding or round, and when it is concave it is said to be hollow.Modern Machine-Shop Practice, Volumes I and II|Joshua Rose
Lanceolate and concave on one side at the base, and on the other at the apex.An Introduction to Entomology: Vol. IV (of 4)|William Kirby
Or, thirdly, straight in the upper part, and concave in the under.A Treatise on Painting|Leonardo Da Vinci
This ornament, when found, lay on the breast-bone of a skeleton, with the concave or ornamented side uppermost.Art in Shell of the Ancient Americans|William H. Holmes