Bulla

Definition of 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; as, the tympanic or auditory bulla.
	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.

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