Unit of heat: Abbr.

• 251.9 cals
• 1,055 joules
• Furnace capacity measure
• A.C. capacity
• Horsepower fraction
• A.C. output
• About 252 cals

Wiktionary Word definitions in Wiktionary
init. British thermal unit

Wikipedia Word definitions in Wikipedia
BTU is an acronym referring to the British thermal unit BTU may also refer to: Bathurst Trade Union , the first trade union organization in Bathurst in The Gambia Benzylthiouracil , a pharmaceutical compound "BT-U", a track on the John Abercrombie album, ...