Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A unit of heat equal to 100,000 British thermal units (1.054 × 108 joules).
  • n. A unit of heat equal to 1,000 large calories.
  • n. A unit of heat equal to the large calorie.
  • n. A unit of heat equal to the small calorie.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A former unit of heat equal to 100,000 British thermal units

from the GNU version of the Collaborative International Dictionary of English

  • n. one of several units of heat, especially one equivalent to 1000 large calories, or 100,000 British thermal units.

from The Century Dictionary and Cyclopedia

  • n. A unit of thermal capacity variously defined as the equivalent of the gram-calory, the kilogram-calory and one thousand kilogram-calories. Of these values the one commonly accepted is that which makes the therm equal to one gram-calory.
  • n. See tharm.
  • n. A hot bath; by extension, any bath or pool.
  • n. In physics, a thermal unit, the water-gram-degree or (small) calory, the amount of heat required to raise one gram of water at its maximum density through one degree centigrade.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a unit of heat equal to 100,000 British thermal units

Etymologies

Greek thermē, heat, from thermos, warm, hot; see gwher- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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