Definition of gamma-aminobutyric acid in English:

gamma-aminobutyric acid

noun

Biochemistry
  • An amino acid that acts to inhibit the transmission of nerve impulses in the central nervous system.

    • ‘Phytosterols, a volatile oil, and amino acids, including gamma-aminobutyric acid and L-canavanine, have been isolated from the root.’
    • ‘Important neurotransmitters that are created from amino acids include serotonin and gamma-aminobutyric acid.’
    • ‘These effects are thought to occur by enhancing the actions of gamma-aminobutyric acid in the central nervous system.’
    • ‘Hypoxia increases central nervous system levels of specific neuroinhibitors such as endogenous opioids, adenosine, and gamma-aminobutyric acid.’
    • ‘Instead, the etiology of the disorder is related to abnormalities of serotonin, norepinephrine, gamma-aminobutyric acid, dopamine, and cholecystokinin.’

Origin

Early 20th century: gamma indicating the relative position of amino on the third carbon away from the acid group.

Pronunciation:

gamma-aminobutyric acid

/ˈɡamə-əˌmēnōbyo͞oˈtirik ˈasid/