What does "convex" mean?

Convex: 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.

Additional senses

  1. 2.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 occasionallyby later poets.

Sources