noun
- A unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure; equivalent to 251. 997 calories.
- synonyms: British thermal unit, BTU
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). b.th.u.. Retrieved September 21, 2026, from http://smartdefine.org/b.th.u./definitions/1258784 |
| Chicago | WordNet. 2010. "b.th.u." http://smartdefine.org/b.th.u./definitions/1258784 (accessed September 21, 2026). |
| Harvard | WordNet 2010, b.th.u., Smart Define, viewed 21 September, 2026, <http://smartdefine.org/b.th.u./definitions/1258784>. |
| MLA | WordNet. "b.th.u." 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/b.th.u./definitions/1258784> |