convexa.[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.()n. A convex body or surface.()Half heaven's convex glitters with the flame. (Tickell.)()