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a. A unit of heat equal to 100,000 British thermal units (1.054 × 108 joules).
b. A unit of heat equal to 1,000 large calories.
a. A unit of heat equal to the large calorie.
b. A unit of heat equal to the small calorie.
(Units) Brit a unit of heat equal to 100 000 British thermal units. One therm is equal to 1.055 056 × 108 joules
[C19: from Greek thermē heat]
any of several units of heat, as one equivalent to 1000 large calories or 100,000 British thermal units.
[1885–90; < Greek thérmē heat]
var. of thermo- before a vowel: thermion.
var. of thermo- as a final element: ectotherm.
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|Noun||1.||therm - a unit of heat equal to 100,000 British thermal units|