Added 9 October 2026 planoconvex adjective Categories: Describing WordsObscure Words adjective ! Definition from Wiktionary (CC BY-SA). More about planoconvex at Wordnik → Where our words come from → Having one side plane and the other convex. .mw-parser-output .defdate{font-size:smaller} Origin From plano- + convex. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: convexbulgingplanoconcaveconcavo-convexconcavoconvexconvexoplanebiconcavebiconvexequiconvexplano-convexplanoconicalconvexoconvex Back to today's word