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单词 involucrum
释义
in·vo·lu·crum (ĭnvə-lkrəm)
n. pl. in·vo·lu·cra (-krə)
An enveloping sheath or envelope, such as the sheath of new bone that forms around a sequestrum.

[New Latin involūcrum, from Latin, wrapper, envelope, from involvere, to enwrap; see INVOLVE.]
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