t 1 h 4 e 1 r 1 m 3
5 letters · 10 points in Scrabble
Meaning
noun a unit of heat equal to 100,000 British thermal units
originProbably from English Hermes or English Terminus, ancient Gods whose statues would often have decoration characteristic of thermed work around their bases.
Etymology from Wiktionary, CC BY-SA 3.0