Horsepower (hp) is unit of measurement of power, the rate at which work is done. The most common conversion factor, especially for electrical power, is 1 hp = 746 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to inclu...

Found on http://en.wikipedia.org/wiki/Horsepower

(h.p.) a unit for measuring the power of engines, motors, etc.; 1 h.p. equals 550 foot-pounds per second.

Found on http://www.horizonsunlimited.com/gear-up/motorcycle-terms-and-glossary

(HP) The motive energy required to raise 550# one foot in one second, friction disregarded. With any rotating engine HP can be determined by multiplying the torque and the revolutions per minute (RPM) and dividing by 5,252.

Found on http://www.eaa.org/experimenter/glossary.asp

1. The power which a horse exerts. ... 2. <machinery> A unit of power, used in stating the power required to drive machinery, and in estimating the capabilities of animals or steam engines and other prime movers for doing work. It is the power required for the performance of work at the rate of 33,000 English units of work per minute; hence, ...

Found on http://www.encyclo.co.uk/local/20973

*(hp)* A unit of power. It is still used commonly in the United States and, more generally, to measure the power of engines. Horsepower is defined as the amount of power that can move a 550-pound object 1 foot in one second of time, or 550 ft × (lbs/s). Another way of thinkin...

Found on http://www.daviddarling.info/encyclopedia/H/AE_horsepower.html

*(hp)* A unit of rate of operation. Electrical hp: a measure of time rate of mechanical energy output; usually applied to electric motors as the maximum output; 1 electrical hp is equal to 0.746 kilowatts or 2,545 Btu per hour. Shaft hp: a measure of the actual mechanical energy per unit time delivered to a turning shaft; 1 shaft Hp is equal t...

Found on https://energy.gov/eere/energybasics/articles/glossary-energy-related-terms

A unit of measurement used to describe an engine

Found on http://www.encyclo.co.uk/local/22062

A unit of measurement used to describe an engine

Found on http://www.superglossary.com/Glossary/Technology/Motorcycle/

A unit of power used to describe the strength of a fluid component. One horsepower equals 746 watts.

Found on https://www.encyclo.co.uk/local/21004

A unit of work. When used to show power usage, one horsepower is equivalent to 746 watts.

Found on http://www.youngco.com/young2.asp?ID=4&Type=3

Horsepower is an imperial unit of power, now replaced by the watt. It was first used by the engineer James Watt, who employed it to compare the power of steam engines with that of horses - one horsepower being the force with which a horse acts when drawing. The mode of ascertaining a horse's power was to find what weight he could raise and to what ...

Found on http://www.probertencyclopaedia.com/browse/GH.HTM

horsepower, unit of power in the English system of units. It is equal to 33,000 foot-pounds per minute or 550 foot-pounds per second or approximately 746 watts. The term horsepower originated with James Watt, who determined by experiment that a horse could do 33,000 foot-pounds of work a minute in d...

Found on http://www.infoplease.com/ce6/sci/A0824234.html

Imperial unit of power, now replaced by the watt. It was first used by the engineer James Watt, who employed it to compare the power of steam engines with that of horses

Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0019441.html

measurement of power, usually mechanical.

Found on http://www.empiremagnetics.com/glossary/glossary.htm#A

Mechanical engineering unit of power.Originally defined by James Watt as 33000 ft lb of work done by a horse in 1 minute.Conversions1 horsepower (hp)=550 ft lbf s-11 hp=33000 ft lbf min-11 hp=745.7 W1 hp=1.014 metric horsepower (PS or ch)1 hp=2546 Btu h-11 hp=42.433 Btu min-11 hp=0.178 kg cal s-1

Found on http://www.diracdelta.co.uk/science/source/h/o/horsepower/source.html

One Horsepower is defined as the amount of work required to raise a 550 pound weight one foot in one

Found on http://www.superglossary.com/Glossary/Technology/Motorcycle/

The common unit of measurement of an engine's power. One horsepower equals 550 foot-pounds per second, the power needed to lift 550 pounds one foot off the ground in one second: or one pound 550 feet up in the same time.

Found on http://www.caranddriver.com/reviews/glossary-of-terms-info

the common unit of power; i.e., the rate at which work is done. In the British Imperial System, one horsepower equals 33,000 foot-pounds of work per ... [3 related articles]

Found on http://www.britannica.com/eb/a-z/h/71

The measure of rate of work. One horsepower is equivalent to lifting 33,000 pounds to a height of on

Found on http://www.superglossary.com/Glossary/Technology/Motors/

The motive energy required to raise 550# one foot in one second, friction disregarded.

Found on http://www.aerofiles.com/glossary.html

The motive energy required to raise 550# one foot in one second, friction disregarded.

Found on http://www.superglossary.com/Glossary/Technology/Aviation/

Type: Term Pronunciation: hōrs′pow-ĕr Definitions: 1. A unit of power, 550 foot-pounds/sec, or 745.7 W.

Found on http://www.medilexicon.com/medicaldictionary.php?t=41583

[

*n]* - a unit of power equal to 746 watts

Found on http://www.webdictionary.co.uk/definition.php?query=horsepower

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