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  1. serotonin love

Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. An organic compound, C10H12N2O, formed from tryptophan and found in animal and human tissue, especially the brain, blood serum, and gastric mucous membranes, and active as a neurotransmitter and in vasoconstriction, stimulation of the smooth muscles, and regulation of cyclic body processes.

Wiktionary

  1. n. biochemistry An indoleamine neurotransmitter, 5-hydroxytryptamine, that is involved in depression, appetite, etc., and is crucial in maintaining a sense of well-being, security, etc.

WordNet 3.0

  1. n. a neurotransmitter involved in e.g. sleep and depression and memory

Etymologies

  1. From sero- + tonic + -in. (Wiktionary)
  2. sero- + ton(e) + -in. (American Heritage® Dictionary of the English Language, Fourth Edition)

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‘serotonin’ has been looked up 1194 times, added to 14 lists, and has a Scrabble score of 9.