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Brit a unit of heat equal to 100 000 British thermal units. One therm is equal to 1.055 056 × 108 joules
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A unit of heat energy, equal to 100,000 international table British thermal units, or approximately 1.055 × 108 joules.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A quantity of heat equivalent to 100,000 Btu.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.