'Testacean' definitions:

Definition of 'testacean'

From: WordNet
noun
Any of various rhizopods of the order Testacea characterized by having a shell

Definition of 'Testacean'

From: GCIDE
  • Testacean \Tes*ta"cean\, n. (Zool.) Onr of the Testacea. [1913 Webster]