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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Test \Test\, Testa \Tes"ta\, noun; pl. E. {Tests}, L. {Test[ae]}. [L. testa a piece of burned clay, a broken piece of earthenware, a shell. See {Test} a cupel.]
1. (Zo["o]l.) The external hard or firm covering of many invertebrate animals.
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 spermoderm.
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