From Longman Dictionary of Contemporary Englishlonghornlong‧horn /ˈlɒŋhɔːn $ ˈlɒːŋhɔːrn/ noun [countable] HBATAa cow with long horns
Examples from the Corpus
longhorn• The house longhorn beetle is another insect pest which seems to be confined to parts of Hampshire and south-west Surrey.• When the railroads provided a market for beef, suddenly the six million longhorns running loose in Texas were worth something.• They certainly do have hundreds of cattle, the longhorn type. 