class Holothuroidea class·ho·lot·huroidea uncommon noun 1. class of echinoderms including the sea cucumbers SynonymsHolothuroideaclass Holothuroidea Related words Broader terms class Parts Echinodermata Part of sea cucumberHolothuridae WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
