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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 Echinoida
 海膽目

From: Webster's Revised Unabridged Dictionary (1913)

 Ech·i·noi·de·a n. pl.  Zoöl. The class Echinodermata which includes the sea urchins.  They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid, Clypeastroid. [Written also Echinidea, and Echinoida.]
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