Source : Webster's Revised Unabridged Dictionary (1913)

Cephalalgia \Ceph`a*lal"gi*a\, n. [L., fr. Gr. ?; ? head + ?
   pain.] (Med.)
   Headache.

Cephalalgia \Ceph`a*lal"gi*a\, Cephalalgy \Ceph"a*lal`gy\, n.
   [L. cephalalgia, Gr. ?; ? + ? pain: cf. F. c['e]phalalgie.]
   (Med.)
   Pain in the head; headache.

Source : WordNet®

cephalalgia
     n : pain in the head caused by dilation of cerebral arteries or
         muscle contractions or a reaction to drugs [syn: {headache},
          {head ache}]