Wiktionary
sex chromosome
n. (context genetics English) either of a pair of chromosomes (in most animals and plants) whose combination determines the sexual characteristics of an individual.
WordNet
sex chromosome
n. (genetics) a chromosome that determines the sex of an individual; "mammals normally have two sex chromosomes"
Usage examples of "sex chromosome".
One in 500 Gliksin children were born with a [[sex-chromosome]] difficulty, such as Klinefelter syndrome (two or more X chromosomes and a Y, or often a mosaic), triple-X syndrome, Turner syndrome (a single X chromosome either completely lacking a mate or with a truncated second sex chromosome), or XYY syndrome, which could predispose males to violence—.
Chromosome 7 is extremely short and dense, and chromosome 8 is assumed to be the sex chromosome.