The Collaborative International Dictionary of English v.0.48:

Marmorate \Mar"mo*rate\, Marmorated \Mar"mo*ra`ted\, a. [L.
   marmoratus, p. p. of marmorate to overlay with marble, fr.
   marmor marble.]
   Variegated like marble; covered or overlaid with marble. [R.]
   [1913 Webster]