noun. ['ˈbʊlə'] the round leaden seal affixed to a papal bull.
noun. ['ˈbʊlə'] (pathology) an elevation of the skin filled with serous fluid.
1. Noun, singular or mass In the Middle Ages, authoritative papal letters were often called "bulls", from the Latin bulla,"" aria-label="Link to "bulla,""> "bulla," or seal, because of the ornate lead seal used to show the importance of the letter.
