We found 14 dictionaries that define the word air sacs:

General (9 matching dictionaries)

1. air sacs: Merriam-Webster
2. air sacs: Collins English Dictionary
3. air sacs: Vocabulary.com
4. air-sacs: Wordnik
5. air sacs: Cambridge Advanced Learner's Dictionary
6. air sacs: Wiktionary
7. Air sacs: Wikipedia, the Free Encyclopedia
8. air-sacs: Webster's 1828 Dictionary
9. Air sacs: TheFreeDictionary.com

Computing (1 matching dictionary)

10. Air sacs: Encyclopedia

Medicine (4 matching dictionaries)

11. air sacs: Merriam-Webster Medical Dictionary
12. Dorland's Illustrated Medical Dictionary (No longer online)
13. Medical Dictionary (No longer online)
14. air sacs: Medical dictionary

(Note: See air_sac as well.)

Definitions from Wiktionary (air sac) ▸ noun:  An alveolus ▸ noun:  An extension of a lung of some birds ▸ Also see air_sac ▸ Words similar to air sacs ▸ Usage examples for air sacs ▸ Idioms related to air sacs ▸ Wikipedia articles (New!) ▸ Words that often appear near air sacs ▸ Rhymes of air sacs ▸ Invented words related to air sacs