tryptophan

n. one of the essential amino acids of the human diet. It is a precursor of the neurotransmitter serotonin and of the hormone melatonin and plays a role in general physiological processes. In plants and many animals, it is also a precursor of the B vitamin nicotinic acid. Tryptophan depletion—loss of tryptophan in the brain—may be induced for research purposes.

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Psychology term of the day

May 9th 2024

hybristophilia

n. sexual interest in and attraction to those who commit crimes. In some cases, this may be directed toward people in prison for various types of criminal activities.