Concave on one side and convex on the other.(adjective)
Having greater curvature on the concave side than on the convex side. Used of a lens.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "concavo-convex" in a sentence
"The coins of these two Greek states in particular were for a long period concavo-convex disks, the convex side being in all instances the obverse."
"(Gr. [Greek: kissos], ivy), biconvex; xystroidal or sistroidal (Gr. [Greek: xystris], a tool for scraping), concavo-convex; amphicoelic"
"Grain is orbicular to ovate, concavo-convex, red-brown, and transversely rugose."