Ech`i*u*roi"de*a (?), n. pl. [NL., fr. echiurus, the name of one genus (Gr. an adder + tail) + -oid.] Zool.

A division of Annelida which includes the genus Echiurus and allies. They are often classed among the Gephyrea, and called the armed Gephyreans.

 

© Webster 1913.

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