The Collaborative International Dictionary of English v.0.48:
Test \Test\, Testa \Tes"ta\, n.; pl. E. Tests, L. Testae.
[L. testa a piece of burned clay, a broken piece of
earthenware, a shell. See Test a cupel.]
1. (Zool.) The external hard or firm covering of many
Note: The test of crustaceans and insects is composed largely
of chitin; in mollusks it is composed chiefly of
calcium carbonate, and is called the shell.
2. (Bot.) The outer integument of a seed; the episperm, or