a brightening exhibited by cooling iron as latent heat of transformation is liberated.
Origin: 1870–75; recal(esce) to become hot again (< L recalēscere, equiv. to re-re-+ cal(ēre) to be hot (cf. calorie) + -ēsc- inchoative suffix + -ere inf. ending) + -escence
re·ca·les·cence (rē'kə-lěs'əns) n. A sudden glowing in a cooling metal caused by liberation of the latent heat of transformation.
[From Latin recalēscēns, recalēscent-, present participle of recalēscere, to grow warm again : re-, re- + calēscere, to become warm, inchoative of calēre, to be warm; see kelə-1 in Indo-European roots.] re'ca·les'cent adj.