a white, crystalline powder, CHO, used as a nonsteroidal, anti-inflammatory drug to relieve pain and reduce fever, esp. in the treatment of arthritis, migraine, and menstrual cramps
See naproxen in American Heritage Dictionary 4
(nə-prŏkˈsən)
noun
A drug, C14H14O3, used to reduce inflammation and pain, especially in the treatment of arthritis.