Klinefelter syndrome
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Related to XXXY syndrome: Klinefelter syndrome, Xfinity, XYY syndrome, Turner syndrome, XXYY syndrome, Xbox LIVE
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| Noun | 1. | Klinefelter 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 |
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