Defenition of the word air sac

• Defenition of the word air sac

  • A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place.
  • any of the membranous air-filled extensions of the lungs of birds
  • any of the thin-walled extensions of the tracheae of insects
  • a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways

Synonyms for the word air sac

• • air cell
  • alveolus

Meronymys for the word air sac

• • bird
  • insect
  • lung

Hypernyms for the word air sac

• • sac

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