carotidynia

Etymology
via erroneous of ; in other words, whereas the suffix  is morphologically appropriate in words such as  and, its use in the coining of the word carotidynia was a misapprehension that got propagated into widespread use and is now idiomatically established, notwithstanding the objection.

Noun

 * 1) A syndrome characterized by unilateral tenderness of the carotid artery, near the bifurcation.