- the full name for GABA
- An amino acid that occurs in the central nervous system and that is associated with transmission of inhibitory nerve impulses.
- An amino acid occurring in the brain as a neurotransmitter that acts to inhibit the transmission of nerve impulses. Certain antianxiety drugs, called benzodiazepines, mimic the actions of gamma-aminobutyric acid. Chemical formula: C4H9NO2.