Category:Bulla

Bul"la, n.; pl. Bullæ (. Etym: [L. bulla bubble. See Bull an edict.]

1. (Med.)

Defn: A bleb; a vesicle, or an elevation of the cuticle, containing a transparent watery fluid.

2. (Anat.)

Defn: 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. (Zoöl.)

Defn: A genus of marine shells. See Bubble shell.