D defs.my
Entry 1 sense Webster, 1913

Plano-convex

· Pla·no-con·vex · IPA
01 a. Plane or flat on one side, and convex on the other; as, a plano-convex lens. See Convex, and Lens.
  1. 1.
    Plane or flat on one side, and convex on the other; as, a plano-convex lens. See Convex, and Lens. See: Convex, Lens