X
Xanax
n. A brand name for alprazolam, which is one of a family of addictive central nervous system depr...
xanthopsia
n. A visual disorder in which everything appears yellow. It can be temporarily induced by staring...
X chromosome
n. A female sex chromosome, one copy of which is present in all the cells of a male's body and tw...
xenophobia
n. An abnormal fear of strangers or people from different countries, cultures, subcultures, ethni...
XXX syndrome
n. A randomly occurring genetic defect in which a female has three instead of two female chromoso...
XXY syndrome
n. A genetic disorder of males characterized by the presence of an extra X, or female sex, chromo...
XYY syndrome
n. A genetic disorder in which a male has two copies of the male sex chromosome instead of one. M...