from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To remove embedded gas from (a solid), as by heating or reducing the pressure.
- intransitive v. To lose gas, as from a solid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To release gaseous substances into the air, especially of a polymer material as it is aged or heated.
From out + gas. (Wiktionary)