noun
also bron·cho ˈbräŋ(ˌ)kō, -än(-
( -s )
Etymology: Mexican Spanish bronco, from Spanish, rough, wild, from (assumed) Vulgar Latin bruncus knot in wood (whence Italian bronco stub of a branch, Old Provençal bronc projection, roughness)
1. : an unbroken or imperfectly broken range horse of western No. America ; sometimes : a vicious or unbreakable horse or one trained to buck — compare cayuse
2. : any range horse : mustang