(n)a solid solution of carbon in alpha-iron that is formed when steel is cooled so rapidly that the change from austenite to pearlite is suppressed; responsible for the hardness of quenched steel
[いたち;イタチ, itachi ; itachi](n) (1) (uk) weasel (esp. the Japanese weasel, Mustela itatsi); (2) mustelid (any other member of the weasel family, inc. badgers, martens, minks, ferrets, otters, polecats, stoats, skunks, etc.)[Add to Longdo]