What is the definition of British thermal unit (btu)? | Dictionary.net

BRITISH THERMAL UNIT (BTU)

\bɹˈɪtɪʃ θˈɜːmə͡l jˈuːnɪt bˌiːtˌiːjˈuː], \bɹˈɪtɪʃ θˈɜːmə‍l jˈuːnɪt bˌiːtˌiːjˈuː], \b_ɹ_ˈɪ_t_ɪ_ʃ θ_ˈɜː_m_əl j_ˈuː_n_ɪ_t__ b_ˌiː_t_ˌiː_j_ˈuː]\

Definitions of BRITISH THERMAL UNIT (BTU)

1910 - Black's Law Dictionary (2nd edition)

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A traditional unit of energy equal to about 1,055 joules. It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water (i.e. exactly one tenth of a UK gallon, or around 0.1198 US gallons) from 39 to 40

1910 - Black's Law Dictionary (2nd edition)
By Henry Campbell Black

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