plural of thermal / thermal underwear

Pertaining to heat or temperature. / (fabric) Providing efficient insulation so as to keep the body warm. / Caused or brought about by heat.

(meteorology) A column of rising air in the lower atmosphere created by uneven heating of Earth's surface.

(stone) To create a rough finish on stone by treating it with a high-temperature blow-torch. / (gliding, often in the present participle) To fly an unpowered aircraft in a (thermal) column of rising air.

simple past tense and past participle of thermalize

(physics, of fast neutrons in a nuclear reactor) Brought to a lower velocity and kinetic energy by use of a moderator.

(physics) to lower the velocity and kinetic energy of fast neutrons in a nuclear reactor by use of a moderator, and thus increase the efficiency of fission

Regarding heat.

(physics) The process of reaching thermal equilibrium by mutual interaction.

plural of thermalization