[ hol-uh-thoo r-ee-uh n, hoh-luh- ]
/ ˌhɒl əˈθʊər i ən, ˌhoʊ lə- /


any echinoderm of the class Holothuroidea, comprising the sea cucumbers.


belonging or pertaining to the Holothuroidea.


Fend Off Sciolism With This Word Of The Day Quiz
Are you the Cinderella of this week’s quiz? Test your memory on the words and definitions from March 23–29.
Question 1 of 7
Also hol·o·thu·ri·oid [hol-uh-thoo r-ee-oid] /ˌhɒl əˈθʊər iˌɔɪd/.

Origin of holothurian

1835–45; < New Latin Holothuri(a) genus name (plural of Latin holothūrium < Greek holothoúrion kind of zoophyte, equivalent to holo- holo- + -thourion < ?) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for holothurian

British Dictionary definitions for holothurian

/ (ˌhɒləˈθjʊərɪən) /


any echinoderm of the class Holothuroidea, including the sea cucumbers, having a leathery elongated body with a ring of tentacles around the mouth


of, relating to, or belonging to the Holothuroidea

Word Origin for holothurian

C19: from New Latin Holothūria name of type genus, from Latin: water polyp, from Greek holothourion, of obscure origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for holothurian

[ hŏl′ə-thurē-ən, hō′lə- ]

Any of various echinoderms of the class Holothuroidea, characterized by elongated bodies with tentacles around the mouth and five rows of tube feet. Holothurians are softer than other echinoderms because they lack spines and the skeleton is greatly reduced. Holothurians can extrude their internal organs to distract predators and grow a new set within a few weeks. Also called sea cucumber
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.