cattelo UK /ˈkæt.əl.əʊ/US /ˈkæt.ə.loʊ/ noun1 •A cross between domestic cattle and buffalo.“They purposely crossed bison with domestic cattle to make a better beef animal,” which they called cattelo, said James Derr, a geneticist at the Texas A&M College of Veterinary Medicine. — 2007 formscatteloes