Klinefelter Syndrome Definition

klīn ′ fĕl′tər
noun
A condition in which a person has one Y-chromosome and two (or more) X-chromosomes, usually characterized by low testosterone levels, small testicles, tall stature and long limbs, sparse body hair, and infertility.
American Heritage Medicine

A genetic condition in which a male is born with two X chromosome.

Wiktionary
Synonyms:
  • XXY-syndrome
  • Klinefelter's syndrome