[te-stey-shuh
n] 
| having a shell or test. |
| tes·ta·cean (tě-stā'shən) n. Any of various rhizopods of the order Testacea, characterized by the presence of a shell. [From New Latin Testācea, order name, from Latin, neuter pl. of testāceus, covered with a shell, from testa, shell.] tes·ta'cean adj. |
| testacean (tě-stā'shən) Pronunciation Key
Any of various protozoans of the order Arcellinida (or Testacida) that are encased in a shell. Testaceans are rhizopods and are related to amoebas. Their shell usually has one chamber and may be secreted by the organism as a chitinous or siliceous covering, or may be glued together out of sand particles. |