Definition. A type of stock share that is issued in its initial public offering, or IPO, without a stated par value listed. Instead, the stock will be sold based upon what investors will pay for the shares. Also called no par value stock.
X, sometimes referred to as Mr. X, is a fictional character on the American science fiction television series The X-Files. He serves as an informant, leaking information to FBI Special Agents Fox Mulder and Dana Scully to aid their investigation of paranormal cases, dubbed X-Files. The character serves as a replacement for Deep Throat, who had been killed off in the first season finale, The Erlenmeyer Flask.
Medical Definition of X chromosome. : 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 chromosomesâcompare y chromosome.