X

X Chromosome
X Chromosome is one of the two sex chromosomes, X and Y. Sex chromosome is the X or Y chromosome in human beings that determines the sex of an individual. Females have two X chromosomes in diploid cells, males have an X and a Y chromosome.

X-Ray
X-Ray is a type of high-energy radiation. In low doses, x-rays are used to diagnose diseases by making pictures of the inside of the body. In high doses, x-rays are used to treat cancer.

Xerostomia
Pronounced – ZEE-roh-STOH-mee-uh
Xerostomia is dry mouth. This condition can be caused by a number of things, including rheumatoid arthritis, diabetes, kidney failure, infection with HIV (the virus that causes AIDS), drugs used to treat depression, and radiation treatment for mouth or throat cancer.