Kilo_(metric_prefix)
Kilo-
Decimal unit prefix in the metric system
Kilo is a decimal unit prefix in the metric system denoting multiplication by one thousand (103). It is used in the International System of Units, where it has the symbol k, in lowercase.
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The prefix kilo is derived from the Greek word χίλιοι (chilioi), meaning "thousand".
In 19th century English it was sometimes spelled chilio, in line with a puristic opinion by Thomas Young.[1][2] As an opponent of suggestions to introduce the metric system in Britain, he qualified the nomenclature adopted in France as barbarous.