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Longman Dictionary of Contemporary English
▪ Extracted hazardous materials Crec charges its clients 82 cents per kilogram to dismantle computers in a factory once used to manufacture them.
▪ It is available in 250 gram and 400 gram bags as well as 20 kilogram bales, to suit individual requirements.
▪ It is the number of moles of solute in one kilogram of solvent.
▪ Its base unit is the kilogram although in chemical calculations it is often more convenient to use grams.
▪ On the Space Shuttle, that cost is close to $ 10, 000 per kilogram.
▪ One mole of an un-ionized solute dissolved in 1 kilogram of water lowers the freezing point 1. 86-6.
▪ The billet has to be highly dense and of high integrity and will be used to make new kilogram mass standards.
▪ Two years ago it fetched almost $ 2 a kilogram.
The Collaborative International Dictionary

Kilogram \Kil"o*gram\, Kilogramme \Kil"o*gramme\, n. [F. kilogramme; pref. kilo- (fr. Gr. chi`lioi a thousand ) + gramme. See 3d Gram.] A measure of weight, being a thousand grams, equal to 2.2046226 pounds avoirdupois (15,432.34 grains). It is equal to the weight of a cubic decimeter of distilled water at the temperature of maximum density, or 39[deg] Fahrenheit.

Douglas Harper's Etymology Dictionary

"one thousand grams," 1797, from French kilogramme (1795); see kilo- + gram.


n. 1 In the International System of Units, the base unit of mass; conceived of as the mass of one liter of water, and now defined as the mass of a specific cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures in France. Symbol: kg 2 (context proscribed English) ''Hence,'' the unit of weight such that a one-kilogram mass is also a one-kilogram weight.


n. one thousand grams; the basic unit of mass adopted under the Systeme International d'Unites; "a kilogram is approximately 2.2 pounds" [syn: kg, kilo]


The kilogram or kilogramme (SI unit symbol: kg), is the base unit of mass in the International System of Units (SI) (the Metric system) and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as "La Grande K" or "Big K").

The gram, 1/1000 of a kilogram, was provisionally defined in 1795 as the mass of one cubic centimeter of water at the melting point of ice. The final kilogram, manufactured as a prototype in 1799 and from which the IPK was derived in 1875, had a mass equal to the mass of 1 dm of water at its maximum density, approximately 4 °C.

The kilogram is the only SI base unit with an SI prefix ("kilo", symbol "k") as part of its name. It is also the only SI unit that is still directly defined by an artifact rather than a fundamental physical property that can be reproduced in different laboratories. Three other base units ( cd, A, mol) and 17 derived units ( N, Pa, J, W, C, V, F, Ω, S, Wb, T, H, kat, Gy, Sv, lm, lx) in the SI system are defined relative to the kilogram, so its stability is important. Only 8 other units do not require the kilogram in their definition: temperature ( K, °C), time and frequency ( s, Hz, Bq), length ( m), and angle ( rad, sr).

The International Prototype Kilogram was commissioned by the General Conference on Weights and Measures (CGPM) under the authority of the Metre Convention (1875), and in the custody of the International Bureau of Weights and Measures (BIPM) who hold it on behalf of the CGPM. After the International Prototype Kilogram had been found to vary in mass over time relative to its reproductions, the International Committee for Weights and Measures (CIPM) recommended in 2005 that the kilogram be redefined in terms of a fundamental constant of nature. At its 2011 meeting, the CGPM agreed in principle that the kilogram should be redefined in terms of the Planck constant. The decision was originally deferred until 2014; in 2014 it was deferred again until the next meeting. There are currently several different proposals for the redefinition (some of which have been abandoned); these are described in the Proposed Future Definitions section below.

The International Prototype Kilogram (IPK) is rarely used or handled. Copies of the IPK kept by national metrology laboratories around the world were compared with the IPK in 1889, 1948, and 1989 to provide traceability of measurements of mass anywhere in the world back to the IPK.

The avoirdupois (or international) pound, used in both the imperial and US customary systems, is defined as exactly , making one kilogram approximately equal to 2.2046 avoirdupois pounds. Other traditional units of weight and mass around the world are also defined in terms of the kilogram, making the IPK the primary standard for virtually all units of mass on Earth.

Usage examples of "kilogram".

At least four hundred kilograms of anthrax, prepared in dry form for use as an aerosol, would be required for ten warheads.

And the most wonderful part is that a piece of tape one centimeter square holds around a hunderd million of these little artificial gecko setae and can actually support a weight of one kilogram.

And the most wonderful part is that a piece of tape one centimeter square holds around a hundred million of these little artificial gecko setae and can actually support a weight of one kilogram.

The counter-mass, a kilogram of harmless plastic chips, sprayed behind the launcher as the rocket shot from the tube.

Before he quit Belgrade, a thumbnail-sized sample of Uranium 235 was stolen from the Vinca Institute, and the records were changed to show that a full fifteen kilograms had really gone missing.

Give him fifteen millilitres per kilogram stat over the next ten minutes.

Mirror was permeable only to objects of less than about a hundred kilograms.

In the year in which I electronically set down these words, standing in close sight of the end of the twentieth century, I find that I can ordinarily manage with a mere couple of kilograms of that dear crumbly soil, sealed sanitarily in a plastic bag beneath my bottom sheet or mattress.

M1D7 you see up there weighed 360,000 kilograms and had armor thick enough and strong enough to defeat any antitank weapon of its day.

The heavy baseplate, bridge, and standard, weighing altogether over 100 kilograms, are not needed.

Stahn hurtling through cislunar vacuum, Stahn wrapped inside the fifteen kilograms of imipolex that had once been Wendy and which now was Quuz.

The pitons, for example, were fastened with a type of glue that supposedly would hold a hundred kilograms and therefore prevented the need to bang holes noisily in solid granite.

Phosrock broke down somewhere along a tonne of ore processed down to sixty kilograms of formanite, an essential ingredient in the new deep-space tracking systems.

Portsmouth OH reports four kilograms of enriched uranium hexafluoride missing and then suffers a cataclysmic fire that forces evacuation of six downwind counties.

Moana to fly him, giving her three nanograms of quantum dots and five kilograms of imipolex for her pay.