medicinal-leech

medicinal leech

noun
a bloodsucking leech, Hirudo medicinalis, of Europe, introduced into the northeastern U.S., usually green with brown stripes, up to 4 inches (10 cm) long: once used by physicians to bleed patients.

Origin:
1885–90

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
medicinal leech
 
n
a large European freshwater leech, Hirudo medicinalis, formerly used in medical bloodletting

Collins English Dictionary - Complete & Unabridged 10th Edition
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