Convex \Con"vex\, a. [L. convexus vaulted, arched, convex, concave, fr. convehere to bring together: cf. F. convexe. See Vehicle.]

Rising or swelling into a spherical or rounded form; regularly protuberant or bulging; -- said of a spherical surface or curved line when viewed from without, in opposition to concave.

Drops of water naturally form themselves into figures with a convex surface. --Whewell.

Double convex, convex on both sides; convexo-convex.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Convex \Con"vex\, n. A convex body or surface.

Half heaven's convex glitters with the flame. --Tickell.

Note: This word was often pronounced con-vex' by early writers, as by Milton, and occasionally by later poets.

Source: Webster's Revised Unabridged Dictionary (1913)