melatonin - WordReference.com Dictionary of English

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- See Also:
- - melamine
  - melancholia
  - melancholy
  - Melanesian
  - melange
  - melanin
  - melanism
  - melanocyte
  - melanoma
  - melanosis
  - melatonin
  - Melba sauce
  - Melba toast
  - meld
  - melee
  - melic
  - melick
  - melilot
  - meliorate
  - meliorism
  - melisma
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melatonin

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Concise Oxford English Dictionary © 2008 Oxford University Press:
melatonin /ˌmɛləˈtəʊnɪn/

▶noun Biochemistry a hormone secreted by the pineal gland which inhibits melanin formation.

– origin 1950s: from Gk melas ‘black’ + serotonin.

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