horseleech

[ hawrs-leech ]
/ ˈhɔrsˌlitʃ /

noun

a large leech, as Haemopis marmoratis, that infests the mouth and nasal passages of horses.

Origin of horseleech

First recorded in 1400–50, horseleech is from the late Middle English word horsleych. See horse, leech1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for horseleech

horseleech

/ (ˈhɔːsˌliːtʃ) /

noun

any of several large carnivorous freshwater leeches of the genus Haemopis, esp H. sanguisuga
an archaic name for a veterinary surgeon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012