WordReference Random House Unabridged Dictionary of American English © 2026
therm
(thûrm),USA pronunciation n. [Physics.]
therm-,
-therm,
therm.,
- Physicsany of several units of heat, as one equivalent to 1000 large calories or 100,000 British thermal units.
- Greek thérmē heat
- 1885–90
therm-,
- var. of thermo- before a vowel:thermesthesia.
-therm,
- var. of thermo- as final element in compound words:isotherm.
therm.,
- Physicsthermometer.
'therm-' also found in these entries (note: many are not synonyms or translations):
therm
- thermo-
- dermatherm
- diathermic
- ectotherm
- endotherm
- endothermic
- euthermic
- Fervidor
- hyperthermia
- hypothermia
- isallotherm
- isobathytherm
- isodrosotherm
- isogeotherm
- megatherm
- microtherm
- thermal
- thermalgesia
- thermanesthesia
- thermate
- therme
- thermel
- thermesthesia
- thermic
- Thermidor
- thermion
- thermionic current
- thermionic tube
- thermionic valve
- thermistor
- thermite
- -thermy