echiuroidea Meaning, Definition & Usage

Ech`i*u*roi"de*a noun plural
Etymology
NL., fr. echiurus, the name of one genus (Gr. an adder + tail) + -oid.
Definitions
  1. (Zoöl.) 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