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noun

alveolus

a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways

In a sentence

Three example sentences with alveolus, each labelled with its topic.

  • Emphysema destroys the walls of each alveolus, so oxygen crosses into the bloodstream far more slowly than it should.

    Medicine

  • Altitude training expands how much oxygen every alveolus can transfer, which is why marathoners spend summers camped in Colorado.

    Fitness

  • A trumpet teacher sketched the lungs on a napkin, showing how each alveolus supplies the breath a long phrase demands.

    Music

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