CEPHALIC is a 8 letter word that starts with C.

1. \Ce*phal"ic\, a. [L. cephalicus, Gr. ?, fr. ? head: cf.
   F. c['e]phalique.] (Anat.)
   Of or pertaining to the head. See the Note under {Anterior}.
   
   {Cephalic index} (Anat.), the ratio of the breadth of the
      cranium to the length, which is taken as the standard, and
      equal to 100; the breadth index.
   
   {Cephalic vein}, a large vein running from the back of the
      head alond the arm; -- so named because the ancients used
      to open it for disorders of the head. --Dunglison.
   
   

2. \Ce*pha"lic\, n.
   A medicine for headache, or other disorder in the head.