gamma-aminobutyric acid

noun

1. GABA.

noun

1. the full name for GABA

n.

1. An amino acid that occurs in the central nervous system and that is associated with transmission of inhibitory nerve impulses.

1. 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.