concaved

concaveleft to right: biconcave, plano-concave, and concavo-convex lenses

con·cave

C0542300 (kŏn-kāv′, kŏn′kāv′)adj. Curved like the inner surface of a sphere.n. A concave surface, structure, or line.tr.v. con·caved, con·cav·ing, con·caves To make concave.

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[Middle English, from Latin concavus : com-, intensive pref.; see com- + cavus, hollow; see keuə- in Indo-European roots.]

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con·cave′ly adv.con·cave′ness n.