wi·ki 
(wĭkē)
(wĭkē)n. pl. wi·kis
A collaborative website whose content can be edited by anyone who has access to it.
[Originally an abbreviation of WikiWikiWeb, software developed by American computer programmer Howard G. Cunningham (born 1949) : Hawaiian wikiwiki, quick (akin to Tahitian viti, vitiviti, deft, from Proto-Eastern-Polynesian *witi) + WEB.]