B.T.U.
or BTU, B.t.u., B.th.u., Btu
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Physics.
British thermal unit; British thermal units.
British thermal unit
noun Physics.
the amount of heat required to raise the temperature of 1 pound (0.4 kg) of water 1°F. Abbreviation: Btu, BTU, B.t.u., B.T.U., B.th.u.
Origin of British thermal unit
First recorded in 1875–80
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for btu
The president's economic plan included an energy BTU tax, and NAFTA.
He was a trader from Btu Bra, and he had been selling the famous silks of his country in the villages up our river.
Unaddressed Letters|Anonymous
btu
BThU
abbreviation for
British thermal unitUS abbreviation: BTU
BTU
abbreviation for
Board of Trade Unit
British thermal unit
noun
a unit of heat in the fps system equal to the quantity of heat required to raise the temperature of 1 pound of water by 1°F. 1 British thermal unit is equivalent to 1055.06 joules or 251.997 caloriesAbbrevs: btu, BThU
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Btu
abbr.
British thermal unit
British thermal unit
n.
The quantity of heat required to raise the temperature of one pound of water from 60° to 61°F at a constant pressure of one atmosphere.
The quantity of heat equal to 1180 of the heat required to raise the temperature of one pound of water from 32° to 212°F at a constant pressure of one atmosphere.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Btu
Abbreviation of British thermal unit
British thermal unit
[ brĭt′ĭsh ]
A unit used mainly to measure heat but also applied to other forms of energy. One British thermal unit is equal to the amount of heat needed to raise the temperature of one pound of water by one degree Fahrenheit, or 251.997 calories.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
British thermal unit
A unit for measuring heat. One Btu raises the temperature of one pound of water one degree Fahrenheit (see also Fahrenheit).
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.