incalescence

noun

in·​ca·​les·​cence ˌin-kə-ˈle-sᵊn(t)s 

ˌiŋ-

: a growing warm or ardent

incalescent

ˌin-kə-ˈle-sᵊnt 

ˌiŋ-

adjective

Word History

Etymology

Latin incalescere to become warm, from in- + calescere to become warm, inchoative of calēre to be warm — more at lee

First Known Use

1646, in the meaning defined above