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From French, irregular from Ancient Greek prefix χιλιο- (chilio-) "kilo-", from χιλιάς (chilias) "one thousand". The "correct" form would be chili-, resulting in forms such as chiliogram and chiliometer. In fact, one such form (lacking the connecting vowel -o-, which is explained at Hippopotomonstrosesquippedaliophobia) used to exist in English: chilihedron, meaning a thousand-faced solid.
- In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1,000. Symbol: k
- (computing) Multiplying the unit to which it is attached by 210 (1024)
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