/ahrs fen"euh meen', -min/ , n. Pharm.
a yellow, crystalline powder, C 12 H 12 N 2 O 2 As 2 ·2HCl·2H 2 O, formerly used to treat diseases caused by spirochete organisms, esp. syphilis and trench mouth: first known as "606."
[ 1915-20; ARS(ENIC) + PHEN(YL) + AMINE ]