Daily Almanac for
Nov 30, 2009
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mar•tens•ite



Pronunciation: (mär'tn-zīt"), [key]
n. Metall.
a metastable microconstituent of any of various forms of carbon steel, produced by undercooling sufficiently below the normal transformation temperature, esp. a hard, brittle product of the decomposition of austenite, produced in this way.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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