[ bool-uh, buhl-uh ]
/ ˈbʊl ə, ˈbʌl ə /
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noun, plural bul·lae [bool-ee, buhl-ee]. /ˈbʊl i, ˈbʌl i/.
a seal attached to an official document, as a papal bull.
an ancient Roman pendant, consisting of a rounded box containing an amulet.
Pathology. a large vesicle.
Zoology. a blisterlike or bubblelike prominence of a bone, as that of the tympanic bone in the skull of certain mammals.
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Origin of bulla
1840–50; <Latin: bubble, also stud, boss, knob (whence Medieval Latin bulla official seal)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use bulla in a sentence
As the auditory bullae become more inflated, the index increases toward 100.
The diagnostic characters were the length and breadth of the rostrum and the relatively great inflation of the auditory bullae.
Exception is to be made for the ear and tympanic bullae, which are of approximately the same size in the two subspecies.
The specimen from Mattomi seems to be unique in the large size of the tympanic bullae.
Some bullae or blebs have formed in the vicinity of the gangrenous spot.Report on Surgery to the Santa Clara County Medical Society|Joseph Bradford Cox
British Dictionary definitions for bulla
/ (ˈbʊlə, ˈbʌlə) /
noun plural -lae (-liː)
a leaden seal affixed to a papal bull, having a representation of Saints Peter and Paul on one side and the name of the reigning pope on the other
an ancient Roman rounded metal or leather box containing an amulet, worn around the neck
pathol another word for blister (def. 1)
anatomy a rounded bony projection
Word Origin for bulla
C19: from Latin: round object, bubble
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012