[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.
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
(hŏl’ə-thr’ē-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.


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