MELATONIN


Meaning of MELATONIN in English

n.

Pronunciation: ˌ me-l ə - ' t ō -n ə n

Function: noun

Etymology: Greek melas black + -tonin (as in serotonin )

Date: 1958

: a vertebrate hormone that is derived from serotonin, is secreted by the pineal gland especially in response to darkness, and has been linked to the regulation of circadian rhythms

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.