Bul"la (?), n.; pl. Bullae (). [L. bulla bubble. See Bull an edict.]
A bleb; a vesicle, or an elevation of the cuticle, containing a transparent watery fluid.
The ovoid prominence below the opening of the ear in the skulls of many animals; as, the tympanic or auditory bulla.
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.
A genus of marine shells. See Bubble shell.
© Webster 1913.