Definition of bulla in English:



  • 1Medicine
    A large blister containing serous fluid.

    • ‘Within three weeks, his toes turned black and serous-filled bullae erupted.’
    • ‘Patients with gonococcal infection may have a rash, pustules, or hemorrhagic bullae.’
    • ‘The bullous form of impetigo presents as a large thin-walled bulla containing serous yellow fluid.’
    • ‘It may change colour sequentially from a red-purple to a dusky blue before progressing to necrosis and formation of bullae and eventually becoming haemorrhagic.’
    • ‘Porphyria cutanea tarda presents with photosensitivity, skin fragility, bruising, and vesicles and bullae that can become hemorrhagic.’
    bleb, bulla, pustule, vesicle, vesication, blain
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    1. 1.1An abnormal air-filled cavity in the lung.
      • ‘In the early stages of the disease the alveolar walls appear perfectly normal while in the later stages, fibrosis of the alveolar wall with blebs and bullae is common.’
      • ‘Examination of the surgical specimen revealed a lobe of lung with focal hemorrhage and subpleural bullae.’
      • ‘His chest x ray showed bullae but no collapse, although an emergency computed tomogram confirmed a large, right sided pneumothorax.’
      • ‘Thus, the resection of the bullous area has to be done with care, and the entire lung should be inspected for other blebs or bullae.’
      • ‘Finding a large, ruptured emphysematous bulla makes resection mandatory.’
      space, chamber, hollow, hole, pocket, pouch
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  • 2Anatomy
    A rounded prominence.

    • ‘On the ventral surface of the cranium, the bullae are small, and the paroccipital processes are long and straight.’
    • ‘The prootic is a paired bone that forms the anterior lateral face of the auditory bulla.’
    • ‘The skulls of chinchilla rats have long and narrow rostra, a rounded braincase, enlarged bullae, and delicate zygomatic arches.’
    • ‘The jugular process is enlarged and the tympanic projection is extended anteriorly from the ventral surface of the tympanic bulla.’
    • ‘Directly observable from fossils, the ancestral cetacean also had a pachyostotic bulla and elongate molar shear facets.’
    protuberance, projection, swelling, bump, bulge, lump
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  • 3A round seal attached to a papal bull, typically one made of lead.

    • ‘One venerable conjecture was that it began as a contemptuous reference to papal edicts known as bulls (from the bulla, or seal, appended to the document).’
    • ‘‘The discovery is of considerable archaeological interest’, says Pestell. ‘Not only are bullae of this date incredibly rare, so are any seals’.’


Latin, literally bubble.