ˌjē(ˌ)āchˈbē noun
( -s )
Etymology: g amma h ydroxy b utyrate
: a metabolite C 4 H 8 O 3 of gamma-aminobutyric acid that is a depressant of the central nervous system and is used illicitly in the form of its synthetic sodium salt to produce sedative and euphoric effects or to stimulate release of growth hormone to increase muscle mass — called also gamma hydroxybutyrate