air-hardening: Meaning and Definition of

air-hard•en•ing

Pronunciation: (âr'här"dn-ing), [key]
— adj. Metall.
  1. noting any metal, esp. alloy steel, that can be hardened from above its transformation point by cooling in air.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.