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Test (biology)
Biologists call test the hard shell of some sphaerical marine animals, notably sea urchins and microorganisms such as testate foraminiferans, and sometimes radiolarians and testate amoebae.
== Origin of the word ==
In an anatomical context, the word "test" is not linked to the empirical definition of "Test (assessment)" : the first one comes from the latin "''testa''" (which means a rounded bowl, amphora or bottle), and the latter one from "''testis''", related to the idea of testimony.
The anatomical "test" is hence comprised in the same etymological field as "testicle", which also refers to the idea of a small, rounded bottle. It also gave the word for "head" in most roman languages (French ''フランス語:tête'', Italian '...).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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