| slovo | definícia |
systeme international
(wn) | Systeme International
n 1: a complete metric system of units of measurement for
scientists; fundamental quantities are length (meter) and
mass (kilogram) and time (second) and electric current
(ampere) and temperature (kelvin) and amount of matter
(mole) and luminous intensity (candela); "Today the United
States is the only country in the world not totally
committed to the Systeme International d'Unites" [syn:
Systeme International d'Unites, Systeme International,
SI system, SI, SI unit, {International System of
Units}, International System] |
systeme international
(foldoc) | Système International d'Unités
Systeme International
System International
Système International
(SI - International System of Units) The
standard set of units of measurement set by the 11th General
Conference on Weights and Measures in 1960. There are seven
base units: the metre (length), the kilogram (mass), the
second (time), the ampere (electrical current), the kelvin
(temperature), the mole (number of atoms) and the candela
(luminous intensity). These are defined either in terms of
physical properties such as the speed of light or, in the case
of mass, by a "prototype" lump of platinum-iridium kept at
BIPM. Derived units like meters per second (speed) are
formed by combining base units. SI also specifies a list of
prefixes (multipliers like "k" for 1000).
SI Home (http://www.bipm.org/en/si/).
(2014-07-08)
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| | podobné slovo | definícia |
Le Systeme International de Unit'es
(gcide) | Metric system \Met"ric sys"tem\n.
A system of weights and measures originating in France, the
use of which is required by law in many countries, and
permitted in many others, including the United States; the
system is also called by its French name, {Le Syst[`e]me
International de Unit['e]s} (abbreviated SI). The principal
unit of length is the meter (see Meter). From this are
formed the are, the liter, the stere, the gram, etc. These
units, and others derived from them, are divided decimally,
and larger units are formed from multiples by 10, 100, 1,000,
and 10,000. The successive multiplies are designated by the
prefixes, deka- (formerly deca-), hecto-, kilo-, and myria-
(seldom used); successive parts by deci-, centi-, and milli-.
The prefixes mega- and micro- are used to denote a multiple
by one million, and the millionth part, respectively; giga-
and nano- denote multiples of one billion (1,000,000,000) and
one billionth, respectively. The prefix for one trillion
(1012) is tera, and for one trillionth (10-12) is pico; for
one quintillion (1015) peta, and for (10-15) (one
quintillionth) femto; for (10-18) atto. See the words formed
with these prefixes in the Vocabulary. For metric tables, see
p. 1682.
[1913 Webster +PJC] |
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