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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 tes·ta /ˈtɛstə/

From: Webster's Revised Unabridged Dictionary (1913)

 Test Tes·ta n.; pl. E. Tests L. Testae
 1. 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.
 2. Bot. The outer integument of a seed; the episperm, or spermoderm.

From: WordNet (r) 2.0

      n : protective outer layer of seeds of flowering plants [syn: episperm,
           seed coat]
      [also: testae (pl)]