/ Thesaurus / P Synonyms of plano convex Find synonyms for: Adjective1. planoconvex, convex (vs. concave), bulgingusage: flat on one side and convex on the otherWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language