Thecosomata
Pronunciation : The`co*so"ma*ta
Part of Speech : n.
Etymology : [NL. See Theca, and Soma.] (Zo?l.)
Definition : Defn: An order of Pteropoda comprising those species which have a shell. See Pteropoda. -- The`co*so"ma*tous, a.
pl.
Source : Webster's Unabridged Dictionary, 1913