en.wikipedia.org/wiki/Units_of_measurement

A unit of measurement is a definite magnitude of a quantity, defined and adopted
by convention or by law, that is used as a standard for measurement of the ...

www.unc.edu/~rowlett/units/

A dictionary of units of measurement: explanations of the metric system, System
Internationale (SI), English customary system, and other modern measuring ...

www.npl.co.uk/reference/measurement-units/

There are two classes of units in the SI: base units and derived units. The base
units provide the reference used to define all the measurement units of the ...

www.mathsisfun.com/measure/unit.html

In Measurement we talk about "Units" ... what are they? A unit is any
measurement that there is 1 of. So 1 meter is a unit. And 1 second is also a unit.
And 1 m/s ...

www.french-metrology.com/en/si/units-measurement.asp

Presentation of units of measurement and the International System of Units (SI):
base units of measurement and derived units, definitions, prefixes, ...

www.edinformatics.com/math_science/units.htm

International System of Units. Background Information. "The creation of the
decimal Metric System at the time of the French Revolution and the subsequent ...

www.rfcafe.com/references/general/tables-of-units-of-measurements.htm

In the metric system of measurement, designations of multiples and subdivisions
of any unit may be arrived at by combining with.

study.com/academy/lesson/standard-units-of-measure.html

Watch this video lesson to learn how to recognize the various units of
measurement for length, weight, time and volume. Learn to recognize both...

www.splung.com/content/sid/1/page/units

Units of measurement, standards, history of the metric system, SI units, weights
and measures. Base units and derived units.

www.factmonster.com/ipka/A0001667.html

Miscellaneous Units of Measure. Below is information about units of measure,
including acre, bolt, gross, hertz, knot, light-year, parsec, pi, ream, sound, square,
...