calescence

calescence

(kəˈlɛsəns)
n
an increasing heat
[C19: from Latin calēscere to grow warm, from calēre to be warm]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014