Answer | Crossword Clue |
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melatonins | MELATONIN, a hormone secreted by the pineal gland during the hours of darkness |
melatonin | a hormone secreted by the pineal gland during the hours of darkness |
pineal | of, relating to, or secreted by the pineal gland a pineal tumor the pineal hormone melatonin |
melatonin | hormone secreted by the pineal gland in inverse proportion to the amount of light received by the retina, important in the regulation of biorhythms: in amphibians, it causes a lightening of the skin |