estrous cycle

the cyclical sequence of reproductive activity shown by female mammals except humans and other primates; see menstrual cycle. Animals that experience one estrous cycle per year are called monestrous; those that have multiple estrous cycles annually are polyestrous. See also diestrus; estrus; proestrus.

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Psychology term of the day

November 18th 2024

parathyroid gland

a small, paired endocrine gland found in the area of the thyroid gland. It secretes parathyroid hormone, which takes part in the control of calcium and phosphate metabolism.