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Origin: L. Bulla bubble. See bull an edict.

1. (Science: medicine) a bleb; a vesicle, or an elevation of the cuticle, containing a transparent watery fluid.

2. (Science: anatomy) 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; especially. 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. (Science: zoology) a genus of marine shells. See Bubble shell.

Retrieved from "http://www.biology-online.org/bodict/index.php?title=Bulla&oldid=33226"
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