Echiuroidea
Pronunciation : Ech`i*u*roi"de*a
Part of Speech : n.
Etymology : [NL., fr. echiurus, the name of one genus (Gr. -oid.] (Zo?l.)
Definition : Defn: A division of Annelida which includes the genus Echiurus and allies. They are often classed among the Gephyrea, and called the armed Gephyreans.
pl.
Source : Webster's Unabridged Dictionary, 1913