Definition of antrum in English:

antrum

noun

Anatomy
  • 1A natural chamber or cavity in a bone or other anatomical structure.

    • ‘Thus removal of a small cholesteatoma may allow for reconstruction of the outer attic wall or creation of a cavity that extends to or just beyond the mastoid antrum.’
    • ‘Then, a fluid-filled space develops, to form the antrum of a tertiary follicle.’
    • ‘It's endoderm ultimately forms the lining of the auditory tube, tympanic cavity and mastoid antrum.’
    • ‘Cholesterol granuloma is usually associated with chronic middle ear disease and is common in the mastoid antrum and air cells of the temporal bone.’
    • ‘The cumulus projects into a single large fluid-filled space, the antrum, formed from the coalescence of the smaller spaces noted previously.’
    space, chamber, hollow, hole, pocket, pouch
    View synonyms
    1. 1.1 The pyloric end of the stomach.
      • ‘Surgical resection of the antrum and first duodenum was performed.’
      • ‘Multiple biopsies were taken from the duodenum, the gastric antrum, and the distal esophagus.’
      • ‘The antrum (ie, lower one-third of the stomach) is important for two main reasons.’
      • ‘The gastroenterologist should map the stomach with adequate sampling of the antrum, corpus, and cardia.’
      • ‘The esophagus, antrum, pylorus, and duodenum were unremarkable.’

Origin

Early 19th century: from Latin, from Greek antron cave.

Pronunciation:

antrum

/ˈantrəm/