Pronunciation: ' kl ī n- ˌ fel-t ə rz-
Function: noun
Etymology: Harry F. Klinefelter † 1990 American physician
Date: 1950
: an abnormal condition in a male characterized by usually two X and one Y chromosomes, infertility, smallness of the testicles, sparse facial and body hair, and enlarged breasts ― called also Klinefelter syndrome