/i fed"rin, ef"i dreen', -drin/ , n. Pharm.
a white, crystalline alkaloid, C 10 H 15 N, obtained from a species of Ephedra or synthesized: used in medicine chiefly for the treatment of asthma, hay fever, and colds.
[ 1885-90; Ephedr ( a ) EPHEDRA + -INE 2 ]