from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An amino acid, C4H9NO2, that is not found in proteins, but occurs in the central nervous system and is associated with the transmission of nerve impulses.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry, physiology An
amino acidfound in the nervous systems of vertebrates and acting as an inhibitory neurotransmitter. Abbreviated as GABA.
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