noun Metallurgy.
absorption of heat without a corresponding increase in temperature when a metal has been heated to a critical point.

1890–95; < Latin dēcalēsc(ent-) (stem of dēcalēscēns) becoming warm (see de-, calescent) + -ence

decalescent, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
decalescence (ˌdiːkəˈlɛsəns)
the absorption of heat when a metal is heated through a particular temperature range, caused by a change in internal crystal structure
[C19: from Late Latin dēcalescere to become warm, from Latin de- + calescere, from calēre to be warm]

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