Klinefelter syndrome

[ klahyn-fel-ter sin-drohm, ‐druhm ]

noun

, Pathology.

1. an abnormal condition in which at least one extra X chromosome is present in a male: characterized by reduced or absent sperm production, small testicles, and in some cases enlarged breasts. : KS

Word History and Origins

Origin of Klinefelter syndrome¹

First recorded in 1945–50; named after Harry Fitch Klinefelter (1912–90), U.S. physician, coauthor of a description of the syndrome