Rocky Mountain goat
noun
a long-haired, white, antelopelike wild goat, Oreamnos americanus, of mountainous regions of western North America, having short, black horns.
Origin of Rocky Mountain goat
An Americanism dating back to 1835–45
British Dictionary definitions for rocky mountain goat
Rocky Mountain goat
noun
a sure-footed goat antelope, Oreamnos americanus, inhabiting the Rocky Mountains. It has thick white hair and black backward-curving horns