Etymology
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cephalalgia (n.)

"head-ache," 1660s, from Latin cephalalgia, from Greek kephalalgia "head-ache," from kephalalges "having a head-ache;" see cephalo- + -algia. Sometimes Englished as cephalalgy. Related: Cephalalgic.

updated on January 08, 2020

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Definitions of cephalalgia from WordNet

cephalalgia (n.)
pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs;
Synonyms: headache / head ache
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.