dorset horn \| ̷ ̷ ̷ ̷| ̷ ̷\noun alsodorset Etymology: from the county of Dorset, England 1.usually capitalized D&H: an English breed of sheep with very large and in the ram much-coiled horns that has a close-textured fleece of medium-length wool and that has been much used for hothouse lamb production because of the early breeding of the ewes and the high percentage of twin lambs 2.-soften capitalized D&H: a sheep of the Dorset Horn breed