•
Xi (business), a Chinese form of business organization •
Xi baryon, a range of baryons with one up or down quark and two heavier quarks • Xi, a brand name for the 4G LTE mobile telecommunications service operated by
NTT DoCoMo in Japan •
Xi (apartment), a brand name for some apartments constructed by GS Construction in Korea. • The
inactive X chromosome in therian female mammals. ==See also==