horsepower
/ˈhɔɹsˌpaʊɚ/
Word Rarity
Rare
Frequency: 3.49 in modern English
18
Scrabble Score
10
Letters
3
Syllables
7
Unique Chars
Meaning
noun
A nonmetric unit of power with various definitions, commonly the mechanical horsepower, approximately equal to 745.7 watts.
Countable; Uncountable
Example Sentences
- "Shillibeer's bus came in 1829 drawn by three horses. Later two horses were found sufficient to pull these closed wagonettes, which eventually had outside seats, and later on the substitution of a motor for horsepower."
- "The Sun Inn is an attractive black-and-white building, and has an old mounting block outside as a reminder of the days when horsepower meant four legs and a saddle."
- "The wheel was to have been turned by horsepower, but it was adapted to be driven by a mill-wheel on the river Derwent […]"
- "Equally I can stand in a station like Lucerne in Switzerland, and watch with ill-concealed admiration the majestic entry of one of the latest Gotthard "Ae 6/6" electrics, packing 6,000 horsepower within its 60 ft. of length and 121 tons of weight, with its sleek dark green sides and handsome stainless steel bands and front wings."
- "As Quincy recovered from our one-block adrenaline burst, I gunned all 700 horsepower once more. Even with the pedal to the metal, the Exelero's sheer bulk caused a multisecond lag from the twin-turbo-charged V12's wind-up to actual launch."
- "In the past, before the widespread adoption of SI units, the work that engines were capable of doing was compared with the work that horses could do – hence the term ‘horsepower’. Various people came up with various equivalencies, but the modern agreed definition is that 1 horsepower is 746 joules per second or 746 watts."
Etymology
From horse + power: the unit was originally defined as the amount of power that a horse could provide. Both non-metric and metric units of power were derived from effectively identical measurements of the power a draught horse could sustain over several hours, with the difference in watts solely due to different rounding errors to express that power in round numbers in the original non-SI units (ft·lbf/min and kgf⋅m/s respectively).
Regional Pronunciation
- American English: /ˈhɔɹsˌpaʊɚ/
- British English: /ˈhɔːsˌpaʊə/