Air Sac (Noun)
Meaning 1
A tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways.
Classification
Nouns denoting body parts.
Synonyms
Hypernyms
Meaning 2
Any of the membranous air-filled extensions of the lungs of birds.
Classification
Nouns denoting animals.
Meaning 3
Any of the thin-walled extensions of the tracheae of insects.
Classification
Nouns denoting animals.