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.