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Meaning of bulla

bul•la

Pronunciation: (bool'u, bul'u), [key]
— pl. bul•lae
  1. a seal attached to an official document, as a papal bull.
  2. an ancient Roman pendant, consisting of a rounded box containing an amulet.
  3. a large vesicle.
  4. a blisterlike or bubblelike prominence of a bone, as that of the tympanic bone in the skull of certain mammals.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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