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Meaning of concavo-convex

con•ca•vo-con•vex

Pronunciation: (kon-kā'vō-kon-veks'), [key]
— adj.
  1. concave on one side and convex on the other.
  2. pertaining to or noting a lens in which the concave face has a greater degree of curvature than the convex face.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.