18-letter words containing i, x, o, r, a
- sex discrimination — the practice of treating male and female people unequally
- sexual intercourse — genital contact, especially the insertion of the penis into the vagina followed by orgasm; coitus; copulation.
- sexual orientation — one's natural preference in sexual partners; predilection for homosexuality, heterosexuality, or bisexuality.
- solvent extraction — Solvent extraction is the separation of a particular substance from a mixture by dissolving that substance in a solvent that will dissolve it, but which will not dissolve any other substance in the mixture.
- unix international — (body) (UI) A consortium including Sun, AT&T and others formed to promote an open environment based on Unix System V, including the Open Look windowing system.
- vermiform appendix — a narrow, blind tube protruding from the cecum, having no known useful function, in humans being 3 to 4 inches (8 to 10 cm) long and situated in the lower right-hand part of the abdomen.
- xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.