an animal developed by crossing the American buffalo, or bison, with beef cattle: supposedly better able to reproduce, grow rapidly, and provide lean meat on a grass diet
See beefalo in American Heritage Dictionary 4
(bēˈfə-lōˌ)
nounpl.beefalobeefalo or beef·a·los or beef·a·loes
A hybrid that results from a cross between the American buffalo, or bison, and beef cattle and is typically 3/8 buffalo and 5/8 bovine. Beefalo yields leaner beef than conventional breeds of cattle. Also called cattalo.