Definitions Found:
of, relating to, or secreted by the pineal gland a pineal tumor the pineal hormone melatonin
- pinealof, relating to, or secreted by the pineal gland a pineal tumor the pineal hormone melatonin
- melatoninsMELATONIN, a hormone secreted by the pineal gland during the hours of darkness
- melatoninhormone 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
- melatonina hormone secreted by the pineal gland during the hours of darkness