therm

noun Physics.

1. any of several units of heat, as one equivalent to 1000 large calories or 100,000 British thermal units.

1. thermometer.

1. variant of thermo- before a vowel: thermesthesia.

1. variant of thermo- as final element in compound words: isotherm.

noun

1. British a unit of heat equal to 100 000 British thermal units. One therm is equal to 1.055 056 × 10 8 joules

pref.

1. Variant ofthermo-

suff.

1. An organism having a specified kind of body temperature:exotherm.