holothurian Holothuria • Holothuridea · · · Info · Definitions · Synonyms · Characters · · holothurian · · Text Latin · · Script 11 · · Length Definitions · · · (noun) echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders. Synonyms: sea cucumber. · · Noun Definition 1 Synonyms · · · sea cucumber · · Synonym 1 Characters · · a latin small letter a U+0061 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 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075