单词	medicinal leech
释义	medicinal leech noun : a large European freshwater leech (Hirudo medicinalis) that is a source of hirudin, is sometimes used to drain blood (as from newly grafted tissue), and was formerly used to bleed patients thought to have excess blood Word History First Known Use 1804, in the meaning defined above Medical Definition medicinal leech noun : a large European freshwater leech of the genus Hirudo (H. medicinalis) that is a source of hirudin, is now sometimes used to drain blood (as from a hematoma), and was formerly used to bleed patients thought to have excess blood
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