Added 9 October 2026 biconvex adjective Categories: Describing WordsRare Words adjective ! Definition from Wiktionary (CC BY-SA). More about biconvex at Wordnik → Where our words come from → Having both sides convex. Related Words: convexlenticularlentiformbulgingconvexo-convexconvexoconvexbiconcaveconcavoconvexconcavo-convexdouble-convexconcavoconcaveconvexoconcave Back to today's word