melatonin

Definition from Wiktionary, the free dictionary
Jump to: navigation, search

English[edit]

Wikipedia has an article on:

Wikipedia

Pronunciation[edit]

  • IPA(key): /ˌmɛləˈtoʊnɪn/

Etymology[edit]

From the beginning of melanin + the ending of serotonin

Noun[edit]

melatonin (usually uncountable, plural melatonins)

  1. A hormone, related to serotonin, that is secreted by the pineal gland, and stimulates colour change in the skin of reptiles, and is involved in the sleep/wake and reproductive cycles in mammals
  2. Any material similar in its chemistry and effect to the natural hormone.