- (US) /æmˈfɛtəmin/
- (organic compound, proper) The racemic freebase of amphetamine, the chemical with an IUPAC name of "1-phenylpropan-2-amine"; equal parts of the levoamphetamine and dextroamphetamine stereoisomer in their pure amine forms.
- (informal) Any mixture of the amphetamine enantiomers, dextroamphetamine and levoamphetamine; any chemical that can be described by an enantiomeric ratio of the amphetamine enantiomers.
- (informal, nonstandard) Referring to a substituted amphetamine; a member of the amphetamine class of chemicals.
- (medicine) A potent central nervous system stimulant of the phenethylamine chemical class that is used to treat ADHD and narcolepsy.