bulla

plural bullae

1. biologyA blister, vesicle, or other thin-walled cavity or lesion, as
2. A blister, vesicle, or other thin-walled cavity or lesion, as:
   1. biology(usually and especially) Such a blister that is more than 5 mm in diameter.
3. archaeologyA clay envelope or hollow ball, typically with seal impressions or writing on its outside indicating its contents.
4. historicalIn ancient Rome, a kind of amulet or boss.
5. historicalCatholicismA handwritten document from the papal chancellery.
6. biologyAny of several hollow structures as features of bones.

   auditory bulla;   ethmoid bulla

   1. biologyThe tympanic part of a temporal bone (having a bubble-like appearance).

plural bullas

1. countableuncountableA rich Jamaican cake made with molasses and spiced with ginger and nutmeg.

plural Bullas

1. A surname.
2. A locality in the Cobar council area, central New South Wales, Australia.
3. A town in the City of Hume, Victoria, Australia.