from The American Heritage® Dictionary of the English Language, 4th Edition
- transitive v. To boil (an egg) in the shell to a solid consistency.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To cook (an egg) to a solid consistency: to cause to be hard-boiled.
Back-formation from hard-boiled.(American Heritage® Dictionary of the English Language, Fourth Edition)
Back-formation from hard-boiled. (Wiktionary)