资料来源 : pyDict

平凸的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Plano-convex \Pla"no-con"vex\, a. [Plano- + convex.]
   Plane or flat on one side, and convex on the other; as, a
   plano-convex lens. See {Convex}, and {Lens}.