Bull in Smiths Bible Dictionary

terms used synonymously with ox, oxen, and properly a generic name for horned cattle when a full age and fit for the plough. It is variously rendered "bullock," Isa 65:25 "cow," Eze 4:15 "oxen," Ge 12:16 Kine is used in the Bible as the plural of cow. In Isa 51:20 the "wild bull" ("wild ox" in De 14:5 ) was possibly one of the larger species of antelope, and took its name from its swiftness. Dr. Robinson mentions larger herds of black and almost harmless buffaloes as still existing in Israel, and these may be the animal indicated.

Link: https://bible-history.com/smiths/B/Bull,+Bullock/