class echinoidea class diplopoda • class equisetatae · · · Info · Definitions · Characters · · class echinoidea · · Text Common · · Latin · · Scripts 16 · · Length 5 · · Syllables Definitions · · · (noun) sea urchins and sand dollars. Synonyms: Echinoidea, class Echinoidea. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073