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.
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 calories Abbrevs btu, BThU
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 1/180 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.
British thermal unit
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.
British thermal unit (Btu)
A unit for measuring heat. One Btu raises the temperature of one pound of water one degree Fahrenheit.
(of a motion picture, photograph, drawing, etc.) black and white, as distinguished from color. a black and white motion picture, photograph, drawing, etc. warfare that makes use of bacteria, viruses, toxins, etc., to disable or destroy people, domestic animals, and food crops. Abbreviation: B.W. noun the use of living organisms or their toxic products to […]
b.y. billion years
bill of exchange. abbreviation bill of exchange bill of entry bill of exchange
b/h bill of health Historical Examples On the assumption that a b/h typesetting error would be more likely, higgest has been amended to biggest. The Pioneer Trail Alfred Lambourne