testacea

from WordNet (r) 3.0 (2006)

Testacea
    n 1: testacean rhizopods [syn: {Testacea}, {order Testacea}]

from The Collaborative International Dictionary of English v.0.48

Testacea \Tes*ta"ce*a\, n. pl. [NL., fr. L. testaceum a shelled
   anumal. See {Testaceous}.] (Zool.)
   Invertebrate animals covered with shells, especially
   mollusks; shellfish.
   [1913 Webster]