ˈrif¦ampə̇n noun
or rif·am·pi·cin (ˈ)rifˈampəsə̇n
( -s )
Etymology: International Scientific Vocabulary, alteration of rifamycin (herein), with -pi- probably from piperazine
: a semisynthetic antibiotic C 43 H 58 N 4 O 12 that is used especially in the treatment of tuberculosis and to treat asymptomatic carriers of meningococci