fäsˈkärnə̇t noun
( -s )
Etymology: probably from International Scientific Vocabulary fos- (alteration of phosph- ) + car b- + -net (of unknown origin)
: a hydrated sodium salt Na 3 CO 5 P·6H 2 O that is an antiviral analogue of pyrophosphate and is administered intravenously to individuals infected with HIV to treat retinitis caused by a cytomegalovirus