(Zool.) 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.
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"Testa" Quotes from Famous Books ![]() ![]() — The PG Edition of Chesterfield's Letters to His Son • The Earl of Chesterfield ![]() ![]() — The Count of Monte Cristo • Alexandre Dumas, Pere ![]() ![]() — Donatello • David Lindsay, Earl of Crawford ![]() ![]() — Stray Studies from England and Italy • John Richard Green ![]() ![]() — Jerome Cardan - A Biographical Study • William George Waters |
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