Testacea
plural noun
Tes·ta·cea
teˈstāsh(ē)ə
: an order of Rhizopoda containing forms (as of the genera Arcella and Difflugia) with an external test
testacean adjective or noun
(ˈ)⸗¦⸗shən
Word History
Etymology
New Latin, from Latin, neuter plural of testaceus covered with a shell