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ID | Word | Wordtype | Definition |
---|---|---|---|
49429 | Echinoidea | n. pl. | The class Echinodermata which includes the sea urchins. They have a calcareous, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid, Clypeastroid. |
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Unturn | Agast | Deccapodous | Ure | Spathic |