退黑激素 tuì hēi jī sù

melatonin

Word data

HSK Not in HSK
Frequency Unknown

Definitions

  1. 1. melatonin

Characters

Character Meaning
退 tuì HSK 5
to withdraw; to retreat; to move back
黑 hēi HSK 2
black; dark; illegal
激 jī HSK 4
to excite; to stimulate; to arouse
素 sù HSK 5
plain, unadorned; vegetarian (food); usually