The Collaborative International Dictionary of English v.0.48:
Convexo-convex \Con*vex"o-con"vex\, a. Convex on both sides; double convex. See under Convex, a. [1913 Webster]WordNet (r) 3.0 (2006):
convexo-convex adj 1: convex on both sides; shaped like a lentil [syn: biconvex, convexo-convex, lenticular, lentiform]