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1a (1): The natural cessation of menstruation occurring usually between the ages of 45 and 55 with a mean in Western cultures of approximately 51. (2): The physiological period in the life of a woman in which such cessation and the accompanying regression of ovarian function occurs--called also climacteric. b: Cessation of menstruation from other than natural causes (as from surgical removal of the ovaries).

Definition from: Merriam-Webster's Medical DictionaryThis link leads to a site outside Genetics Home Reference. by Merriam-Webster Inc.

See also Understanding Medical Terminology.

Published: February 8, 2016