CONCAVE POLYHEDRON(noun)Did you mean?Synonyms Antonyms RhymesDefinitions There is 1 meaning of the phrase Concave Polyhedron. Concave Polyhedron - as a noun A polyhedron some of whose plane sections are concave polygons Word Variations & RelationsStarts CStarts COStarts CONStarts CONCEnds NEnds ONEnds RONEnds DRONStarts C & ends NStarts CO & ends NStarts C & ends ONA-Z Proximitiesconcatenation17concatenations18concause12concauses13concave14 Concave Polyhedron concaved16concavely19concaveness18concavenesses20concaves15