Definition of "therm" [therm]

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "A therm is the energy generated by burning 100 cubic feet of gas."
• "Currently, long-term fixed contracts for Russian natural gas are reported to be priced at 70 English pence per therm which is equivalent to $11.15 per MBTU."
• "Smaller edifices, like temples and mausoleums, were adapted bodily to their new office, while the larger ones, such as thermæ, theatres, circuses, and barracks were occupied in parts only."