Cost Per Click. Very rarely used, but still often requested. Ex: A $5 CPC means that for every click an advertiser receives, he or she is paying $5 for it. Found on http://emailuniverse.com/ezine-tips/?id=1135
Cost Per Click - Cost to an advertiser for each click on a promotional link by a site visitor or newsletter reader. Found on http://www.encyclo.co.uk/local/21549
(Cost Per Click) — A pricing model in which the advertiser is charged for an ad based on how many users click it. This is a common model for search advertising†(the all-text ads associated with search results) and for text ads in general. Found on http://www.journalism.co.uk/terms-definitions-dictionary-terminology-words/