SI unit


Also found in: Thesaurus, Medical, Financial, Encyclopedia, Wikipedia.

SI unit

n
(Units) any of the units adopted for international use under the Système International d'Unités, now employed for all scientific and most technical purposes. There are seven fundamental units: the metre, kilogram, second, ampere, kelvin, candela, and mole; and two supplementary units: the radian and the steradian. All other units are derived by multiplication or division of these units without the use of numerical factors
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

SI unit


n.
any of the basic units of measure in the International System of Units.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.SI unit - 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"
metric system - a decimal system of weights and measures based on the meter and the kilogram and the second
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In a historic decision on November 16, last year, more than 60 countries unanimously voted to redefine kilogram (SI unit of weight) along with three other units Kelvin (SI unit of temperature), mole (SI unit of amount of substance), and ampere (SI unit of current).
What is the SI unit of power, equal to one joule per second?
In science, what does 'SI' stand for in SI Unit? 13.
What is the SI unit of pressure equal to one newton per square metre?
The private labs should use SI unit for uniform and harmonious laboratory results across different labs.
Which French physicist gave his name to the SI unit of electric current?
SI and Metric Unit Cube Quantity SI Unit Metric Unitl Length metre (m) metre (m) Mass kilogram (kg) kilogram (kg) Time second (s) second (s) Electric current ampere (A) ampere (A) Temperature kelvin(K) Degree CeliusfC) Luminous intensity candela (cd) candela (cd) Amount of substance mole (mol) ..
(1), that the reference constant whose numerical value is fixed when it is expressed in its SI unit Hz is [DELTA]v[([.sup.133]Cs).sub.hfs].
He developed the concept of horsepower and the SI unit of power, the watt, was named after him.
There is also a chart of SI unit prefixes ranging from yocot to yotta.
Although standard symbols for units of measure (such as the SI unit symbols) represent both the singular and plural forms, as hoc abbreviations should not.