CASEHARDENING
Case"hard`en*ing, n.
Definition: The act or process of converting the surface of iron into steel. Ure.
Note: Casehardening is now commonly effected by cementation with charcoal or other carbonizing material, the depth and degree of hardening (carbonization) depending on the time during which the iron is exposed to the heat. See Cementation.
Source: Webster’s Unabridged Dictionary 1913 Edition
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24 October 2024
ELLIPSE
(noun) a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it; “the sums of the distances from the foci to any point on an ellipse is constant”
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