Pronunciation: ' el- ' trip-t ə - ˌ fan
Function: noun
Date: 1949
: the levorotatory form of tryptophan that is a precursor of serotonin and was used formerly as a dietary supplement especially to promote sleep and relieve depression
Pronunciation: ' el- ' trip-t ə - ˌ fan
Function: noun
Date: 1949
: the levorotatory form of tryptophan that is a precursor of serotonin and was used formerly as a dietary supplement especially to promote sleep and relieve depression
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012