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Glossary560 definitions

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units Glossary

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A
3 terms
Units

Acceleration

The rate of change of velocity per unit of time.

Units

Acre

A unit of land area used in the imperial and US customary systems.

Units

Ampere (Amp)

The base unit of electric current in the International System of Units (SI).

B
3 terms
Units

Bar (Unit)

A metric unit of pressure, but not part of the International System of Units (SI).

Units

Bit

The basic unit of information in computing and digital communications.

Units

Byte

A unit of digital information that consists of eight bits.

C
3 terms
Units

Candela (cd)

The SI unit of luminous intensity.

Units

Capacity

The maximum amount that something can contain.

Units

Celsius (°C)

A temperature scale where 0°C is the freezing point of water and 100°C is the boiling point.

F
1 term
Units

Fahrenheit (°F)

A temperature scale where 32°F is the freezing point of water and 212°F is the boiling point.

G
1 term
Units

Gradian

A unit of plane angle, equivalent to 1/400 of a turn.

H
3 terms
Units

Hectare

A metric unit of square measure, equal to 100 ares (10,000 square meters).

Units

Hertz (Hz)

The unit of frequency in the International System of Units (SI), defined as one cycle per second.

Units

Horsepower (hp)

A unit of measurement of power, or the rate at which work is done.

J
1 term
Units

Joule

The SI unit of work or energy.

K
1 term
Units

Kelvin (K)

The base unit of temperature in the International System of Units (SI).

L
1 term
Units

Light Year

A unit of length used to express astronomical distances. It is the distance that light travels in a vacuum in one year.

M
2 terms
Units

Mass

A measure of the amount of matter in an object, usually measured in grams or kilograms.

Units

Mole (Unit)

The SI unit of amount of substance.

N
3 terms
Units

Newton (N)

The SI unit of force.

Units

Newton (Unit)

The SI unit of force.

Units

Nibble

A four-bit aggregation, or half an octet.

O
1 term
Units

Ohm

The SI derived unit of electrical resistance.

P
5 terms
Units

Parsec (pc)

A unit of distance used in astronomy, equal to about 3.26 light years.

Units

Pascal (Pa)

The SI unit of pressure.

Units

Pound-force (lbf)

A unit of force in some systems of measurement.

Units

Pressure

Continuous physical force exerted on or against an object by something in contact with it.

Units

PSI (Pounds per Square Inch)

A unit of pressure or of stress based on avoirdupois forces and units.

R
1 term
Units

Radian

The standard unit of angular measure.

S
3 terms
Units

Square Foot

A unit of area used in the imperial and US customary systems.

Units

Standard Atmosphere (atm)

A unit of pressure defined as 101,325 Pa.

Units

Steradian (sr)

The SI unit of solid angle.

T
1 term
Units

Torr

A unit of pressure based on an absolute scale.

V
2 terms
Units

Velocity

The speed of something in a given direction.

Units

Volt

The derived unit for electric potential, electric potential difference (voltage), and electromotive force.

W
2 terms
Units

Watt

The unit of power, defined as one joule per second.

Units

Weight (Physics)

The force exerted on a body by gravity.