semicircle semichrome • semicircled · · · Info · Definitions · Synonyms · Characters · · semicircle · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a plane figure with the shape of half a circle. Synonyms: hemicycle. · · Noun Definition 1 Synonyms · · · hemicycle · · Synonym 1 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073