Kilogram - Wikipedia
网页The kilogram (also spelled kilogramme [1]) is the base unit of mass in the International System of Units (SI), having the unit symbol kg. [1] It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially. [2] It means 'one thousand grams'.
Kilogram Definition & Meaning - Merriam-Webster
网页noun. : the base unit of mass in the International System of Units that is defined by setting the fixed numerical value of Planck's constant to 6.62607015 x 10–34 joule seconds see Metric System Table.
Kilogram | mass, weight, SI unit | Britannica
网页kilogram (kg), basic unit of mass in the metric system. A kilogram is very nearly equal (it was originally intended to be exactly equal) to the mass of 1,000 cubic cm of water. The pound is defined as equal to 0.45359237 kg, exactly.
KILOGRAM | definition in the Cambridge English Dictionary
网页noun [ C ] us / ˈkɪl.ə.ɡræm / uk / ˈkɪl.ə.ɡræm / (written abbreviation kg) Add to word list. A2. a unit of mass equal to 1,000 grams. Examples. One kilogram equals two point two …
Kilogram - Simple English Wikipedia, the free encyclopedia
网页The kilogram is exactly the mass of one litre of water. As of May 20, 2019, the definition of the kilogram is based on the Planck constant as 6.626 070 15 × 10−34 kg⋅m2⋅s−1. [1][2] There are attempts to define the kilogram in other ways.
Kilogram: Introduction | NIST - National Institute of Standards and ...
网页2018年5月14日 · Kilogram: Introduction. For more than a century, the kilogram (kg) — the fundamental unit of mass in the International System of Units (SI) — was defined as exactly equal to the mass of a small polished cylinder, cast in 1879 of platinum and iridium.
KILOGRAM Definition & Meaning | Dictionary.com
网页a unit of mass equal to 1,000 grams: the basic unit of mass in the International System of Units (SI). Up until 2019 the kilogram was defined as equal to the mass of an international prototype, a platinum-iridium cylinder kept in Sèvres, France.
KILOGRAM definition and meaning | Collins English Dictionary
网页A kilogram is a metric unit of weight. One kilogram is a thousand grams, or a thousandth of a metric ton, and is equal to around 2.2 pounds. ...a parcel weighing around 4.5 kilograms. ...a kilogram of butter. [Also + of]
Kilograms conversion calculators, tables and forumas
网页Kilograms conversion calculators, tables and formulas to automatically convert from other weight units.
'Kilograms' or 'Kilogrammes' -- British English
网页2017年3月8日 · kilogram or kilogramme: The SI unit of mass, equivalent to the international standard kept at Sèvres near Paris (approximately 2.205 lb). (ODO) kilogram (n.) etymology: "one thousand grams," standard of mass in the metric system, 1797, from French kilogramme (1795); see kilo- + gram. (Etymonline)