Definition of gamma-aminobutyric acid in English:

Share this entry

gamma-aminobutyric acid

Pronunciation: /ˌɡaməəˌmiːnəʊbjuːˈtɪrɪk/
/-əˌmʌɪnəʊ-/ /-ˈamɪnəʊ-/


[mass noun] Biochemistry
An amino acid which acts to inhibit the transmission of nerve impulses in the central nervous system.
  • Chemical formula: H2NCH2CH2CH2COOH
Example sentences
  • Phytosterols, a volatile oil, and amino acids, including gamma-aminobutyric acid and L-canavanine, have been isolated from the root.
  • Instead, the etiology of the disorder is related to abnormalities of serotonin, norepinephrine, gamma-aminobutyric acid, dopamine, and cholecystokinin.
  • Hypoxia increases central nervous system levels of specific neuroinhibitors such as endogenous opioids, adenosine, and gamma-aminobutyric acid.


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

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.