X chromosome

noun

: a sex chromosome that usually occurs paired in each female cell and single in each male cell in species in which the male typically has two unlike sex chromosomes compare y chromosome

Examples of X chromosome in a Sentence

Recent Examples on the Web

Someone with Klinefelter syndrome, for instance, may be assigned male at birth but has an extra copy of the X chromosome (XXY) rather than the typical XY. —Claire Bugos, Verywell Health, 26 Feb. 2025

Those with two X chromosomes and ovaries lived longest, followed by mice with two X chromosomes and testes. —Mohana Ravindranath, New York Times, 25 Feb. 2025

So if a genetic error on the X chromosome disrupts production of important proteins in the body, male patients suffer the consequence. —Roxanne Khamsi, The Atlantic, 20 Sep. 2024

Not to mention there are people born with just one X chromosome and some with multiple chromosomes XXY, XYY–and still lead healthy lives. —Alex Knapp, Forbes, 24 Jan. 2025

Word History

First Known Use

1911, in the meaning defined above

Rhymes for X chromosome

• acrosome
• aerodrome
• catacomb
• centrosome
• cytochrome
• hippodrome
• honeycomb
• liposome
• meerschaum
• metronome
• microtome
• monochrome

Kids Definition

X chromosome

noun

: a sex chromosome that is associated with femaleness and usually occurs paired in each female cell and single in each male cell in organisms (as human beings) in which the male normally has two unlike sex chromosomes compare y chromosome

Medical Definition

X chromosome

noun

: a sex chromosome that usually occurs paired in each female cell and single in each male cell in species in which the male typically has two unlike sex chromosomes compare y chromosome