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Webster 1913 Edition

Echiuroidea

‖

Echˊi-u-roi′de-a

,

Noun.

pl.

[NL., fr.

echiurus

, the name of one genus (Gr.

ἔχισ

an adder +

οὐρά

tail) +

-oid

.]

(Zoöl.)

A division of Annelida which includes the genus

Echiurus

and allies. They are often classed among the Gephyrea, and called the

armed Gephyreans

.