afterheat

[ af-ter-heet, ahf- ]
/ ˈæf tərˌhit, ˈɑf- /

noun Physics.

the heat generated by radioactivity remaining in a nuclear reactor after it has been shut down.

Origin of afterheat

First recorded in 1970–75; after + heat

British Dictionary definitions for afterheat

afterheat
/ (ˈɑːftəˌhiːt) /

noun

the heat generated in a nuclear reactor after it has been shut down, produced by residual radioactivity in the fuel elements