top-crossn.Horse Riding a cross in which one parent is of pure or superior blood (U.S.).ⓘ
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the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > horse defined by breed > [noun] > thoroughbred horse > cross
top-cross1890
1890 Breeder's Gaz. (Chicago) 28 Mar. A filly with three top crosses or a horse with four top crosses can be registered [in the stud-book].