thermalize

== English == === Alternative forms === thermalise === Etymology === From thermal +‎ -ize. === Verb === thermalize (third-person singular simple present thermalizes, present participle thermalizing, simple past and past participle thermalized) To lower the speed and kinetic energy of fast neutrons in a nuclear reactor by use of a moderator, and thus increase the efficiency of fission ==== Derived terms ==== thermalization