noun
Meaning 1
An alveolus.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Phrase guide
air sac
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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No pronunciation record was provided for this word.
noun
Meaning 2
An extension of a lung of some birds.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 3
any of the membranous air-filled extensions of the lungs of birds
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: sac
noun
Meaning 4
any of the thin-walled extensions of the tracheae of insects
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: sac
noun
Meaning 5
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: alveolus, air cell
Antonyms: none provided
Broader terms: sac
History
Etymology
No etymology was provided for this word.