Wiktionary
three-quarter brother
alt. 1 (context horse breeding English) The male offspring of a horse's sire/dam that is by/out of a sibling of its other parent.Carol W. Mulder, "", ''Arabians Today'', 1986 2 (context horse breeding English) The male offspring of a horse's dam and a son of its sire. 3 (context horse breeding English) The male offspring of a horse's sire and a daughter of its dam. n. 1 (context horse breeding English) The male offspring of a horse's sire/dam that is by/out of a sibling of its other parent.Carol W. Mulder, "", ''Arabians Today'', 1986 2 (context horse breeding English) The male offspring of a horse's dam and a son of its sire. 3 (context horse breeding English) The male offspring of a horse's sire and a daughter of its dam.