Pronunciation: (kē'lō, kil'ō), [key]
3. (a word used in communications to represent the letter K.)
a Greek combining form meaning “thousand,” introduced from French in the nomenclature of the metric system (kiloliter); on this model, used in the formation of compound words in other scientific measurements (kilowatt).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.