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English Lexicon

Alveolus

/ælˈviːə.ləs/
nounCEFR C1 (Advanced)Top #14500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    Any of the many tiny air sacs of the lungs where the exchange of oxygen and carbon dioxide takes place.

    "Oxygen passes through the walls of each alveolus into the bloodstream during respiration."
  2. 2

    A socket in the jawbone in which a tooth is rooted.

    "Dental trauma can sometimes cause damage to the alveolus supporting the molar."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from Latin alveolus, meaning 'a small hollow, cavity, or trough', which is a diminutive of alvus meaning 'belly' or 'hollow'. It entered English medical and anatomical terminology in the 19th century to describe microscopic air sacs in the lungs and tooth sockets in the jaw.

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