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• therm
  therm

  noun

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

  variant of thermo- before a vowel.
• -therm
  -therm

  variant of thermo- as final element in compound words.
• therm.
  therm.

  abbreviation

  thermometer.

therm

¹ American  

[thurm] / θɜrm /

Or therme

noun

Physics.

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

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therm- ² American  

1. variant of thermo- before a vowel.

   thermesthesia.

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-therm ³ American  

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

   isotherm.

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therm. ⁴ American  

abbreviation

1. thermometer.

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therm British  

/ θɜːm /

noun

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

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Etymology

Origin of therm

First recorded in 1885–90, therm is from the Greek word thérmē heat