Bulla
Bul´la
| n. | 1. | (Med.) A bleb; a vesicle, or an elevation of the cuticle, containing a transparent watery fluid. |
| 2. | (Anat.) The ovoid prominence below the opening of the ear in the skulls of many animals; | |
| 3. | A leaden seal for a document; esp. the round leaden seal attached to the papal bulls, which has on one side a representation of St. Peter and St. Paul, and on the other the name of the pope who uses it. | |
| 4. | (Zool.) A genus of marine shells. See Bubble shell. |
| Noun | 1. |  bulla - (pathology) an elevation of the skin filled with serous fluid |
| 2. | bulla - the round leaden seal affixed to a papal bull |