B.T.U.

or BTU, B.t.u., B.th.u., Btu

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Physics.

British thermal unit; British thermal units.

Definition for btu (2 of 2)

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
Dictionary.com Unabridged 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.

    The Last Blowout|The Daily Beast|October 31, 2010|DAILY BEAST
  • He was a trader from Btu Bra, and he had been selling the famous silks of his country in the villages up our river.

British Dictionary definitions for btu (1 of 3)

btu

BThU


abbreviation for

British thermal unitUS abbreviation: BTU

British Dictionary definitions for btu (2 of 3)

BTU


abbreviation for

Board of Trade Unit

British Dictionary definitions for btu (3 of 3)

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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for btu (1 of 2)

Btu


abbr.

British thermal unit

Medicine definitions for btu (2 of 2)

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.

Science definitions for btu (1 of 2)

Btu


Abbreviation of British thermal unit

Science definitions for btu (2 of 2)

British thermal unit

[ brĭtĭsh ]

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.

Culture definitions for btu

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.