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Definition of: holothurian
(hol′ə·th
r′ē·ən) noun
Any of a class (Holothurioidea) of echinoderms with generally wormlike shape, skinlike integument, and tentacles about the mouth: including trepangs, sea cucumbers, sea slugs, etc. [<L holothurium, a kind of zoophyte <Gk. holothurion]
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