The Collaborative International Dictionary of English v.0.48:

Muricate \Mu"ri*cate\, Muricated \Mu"ri*ca`ted\, a. [L.
   muricatus, fr. murex a pointed rock or stone.]
   Formed with sharp points; full of sharp points or of pickles;
   covered, or roughened, as a surface, with sharp points or
   excrescences.
   [1913 Webster]