Alternative letter-case form of Mephistophelean

(chess) The square board used in the game of chess, subdivided into eight rows of eight squares each, the squares in each row and column being of alternating colours.

In a structuralistic manner or context.

(Internet marketing) Initialism of cost per click. / (electrical engineering, UK) Initialism of circuit protective conductor. / Initialism of cetylpyridinium chloride.