A bull is an intact (i.e., not castrated) adult male of the species Bos taurus (cattle). More muscular and aggressive than the female of the species, the cow, the bull has long been an important symbol in many cultures, and plays a significant role in both beef and dairy farming, and in a variety of other cultural activities.

Jean Baptiste François Pierre Bulliard (also Pierre Bulliard, 24 November 1752 Aubepierre-sur-Aube Haute-Marne – 26 September 1793 Paris) was a French physician and botanist.