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[brong-koh] /ˈbrɒŋ koʊ/
noun, plural broncos.
a range pony or mustang of the western U.S., especially one that is not broken or is imperfectly broken.
Also, bronc, broncho.
1865-70, Americanism; < Mexican Spanish, short for Spanish potro bronco untamed colt (in Mexican Spanish: wild horse, half-tamed horse); bronco, apparently nasalized variant of Latin broccus; see broach Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bronco
  • After initial testing, the conventional tail was replaced with a bronco tail.
British Dictionary definitions for bronco


noun (pl) -cos, -chos
(in the US and Canada) a wild or partially tamed pony or mustang of the western plains
Word Origin
C19: from Mexican Spanish, short for Spanish potro bronco unbroken colt, probably from Latin broccus projecting (as knots on wood), hence, rough, wild
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for bronco

also broncho, 1850, American English, "untamed or half-tamed horse," from noun use of Spanish bronco (adj.) "rough, rude," originally a noun meaning "a knot in wood," perhaps from Vulgar Latin *bruncus "a knot, projection," apparently from a cross of Latin broccus "projecting" (see broach (n.)) + truncus "trunk of a tree" (see trunk (n.)). Bronco-buster is attested from 1886.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for bronco



A young male not accustomed to nor complaisant in homosexual relations (1970s+ Homosexuals)

[fr Spanish bronco, ''coarse, rough'']

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Encyclopedia Article for bronco

North American wild or Indian-tamed horse, descended from horses taken to the New World by the Spanish in the 16th century. The name comes from that of an Indian tribe of eastern Washington and Oregon that was known for the small horses it bred.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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