Klinefelter's syndrome(redirected from Kleinfelter)
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Related to Kleinfelter: XYY
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|Noun||1.||Klinefelter's syndrome - syndrome in males that is characterized by small testes and long legs and enlarged breasts and reduced sperm production and mental retardation; a genetic defect in which an extra X chromosome (XXY) is present in the male|
syndrome - a pattern of symptoms indicative of some disease