GNU Collaborative International Dictionary of English

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1.       
    Test (?), ‖Testa (?),  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 invertebrate animals.
   
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   ☞ 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.
   
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   2. (Bot.) The outer integument of a seed; the episperm, or spermoderm.
   
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