DCHP-1 Online
bull ((1)) 
n. a working ox.
- 1889 The work-oxen are bulls or stags.
- 1963 The homeseekers appear, riding on an ox-drawn wagon piled high with household effects. . . . As seen, the "bulls" are too fat and well-fed to be in any way typical of the bony critters seen on western homesteads. . . .
- 1889 The work-oxen are bulls or stags.