/ Dictionary / Index H horseleech: Meaning and Definition of Find definitions for: horse•leech Pronunciation: (hôrs'lēch"), [key] — n. a large leech, as Haemopis marmoratis, that infests the mouth and nasal passages of horses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: horseleech (Thesaurus) horselaugh horseless carriage Related Content Daily Word Quiz: epoch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language