Citations:3/4 sister

Noun: "alternative spelling of three-quarter sister"

 * 1961 — Yorkshire Journal, Volume 13, page 78:
 * His dam is a 3/4 sister to the Illinois, Ohio, and Indiana Grand Champion Boar.
 * 2000 — "Tiznow, Love That Red Post Bullet Works at Santa Anita", Blood-Horse, 21 September 2000:
 * Notable Career, a 3/4-sister of General Challenge, went seven furlongs in 1:26 4/5.