Bul"la (?), n.; pl. Bullae (). [L. bulla bubble. See Bull an edict.]

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.


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.


© Webster 1913.