concavely

con·cave  (kn-kv, knkv) 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. [Middle English, from Latin concavus : com-, intensive pref.; see com- + cavus, hollow; see keu- in Indo-European roots.] con·cavely adv. con·caveness n.

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

Thesaurus

Adv.

1.

concavely - in a concave way; "shaped concavely" convexly - in a convex way; "bulging out convexly"