A comb that is heated (sometimes electrically) and used to straighten a person's hair.

plural of one-hot

plural of hot microphone

(electronics, especially aviation) A microphone that is activated (but not powered) by the sound of the user's voice, allowing it to pick up speech without having to be manually turned on, while still rejecting background noise unaccompanied by speech.

(US navy, slang) USS Carl Vinson (CVN-70)

The part of a 3D printer that heats the filament

(military) To enter the scene of conflict quickly and aggressively. / (by extension) To approach a situation in a state of anger and tension.

nuclear fusion using the conventional method of very high temperatures; in contrast to cold fusion.

plural of hot-pot

plural of hot bed