12-letter words containing i, s, o, x
- over-indexes — (in a nonfiction book, monograph, etc.) a more or less detailed alphabetical listing of names, places, and topics along with the numbers of the pages on which they are mentioned or discussed, usually included in or constituting the back matter.
- overexercise — to exercise excessively
- oxidant smog — photochemical smog.
- pax vobiscum — peace be with you
- polysiloxane — a polymer composed of silicon and oxygen atoms
- postexercise — bodily or mental exertion, especially for the sake of training or improvement of health: Walking is good exercise.
- praxinoscope — a toy in which a sequence of images, depicted on the inner surface of a cylinder and reflected in a series of mirrors, gives the illusion of motion as the cylinder rotates
- proximities' — nearness in place, time, order, occurrence, or relation.
- sex-positive — explicitly stated, stipulated, or expressed: a positive acceptance of the agreement.
- sexdecillion — a cardinal number represented in the U.S. by 1 followed by 51 zeros, and in Great Britain by 1 followed by 96 zeros.
- shooting box — a small house or lodge for use during the shooting season.
- six counties — the historic counties of Northern Ireland, which no longer have a local government function
- six-yard box — On a football pitch, the six-yard box is the rectangular area marked in front of the goal.
- six-year-old — being six years in age
- sixth column — the persons residing in a country at war who are devoted to aiding the fifth column in its activities, especially by lowering morale, spreading rumors, etc.
- sixth former — student: 16-18
- sixty-fourmo — a book size (about 2 × 3 inches; 5 × 7 cm) determined by printing on sheets folded to form 64 leaves or 128 pages.
- sixty-fourth — next after the sixty-third; being the ordinal number for 64.
- sixty-second — next after the sixty-first; being the ordinal number for 62.
- spinning box — centrifugal box.
- stuffing box — a device for preventing leakage of gases or liquids along a moving rod or shaft at the point at which it leaves a cylinder, tank, ship hull, etc.
- sulphadoxine — an antibiotic drug of the sulphonamide group, commonly used in combination with pyrimethamine to treat malaria, and in combination with various drugs to treat certain infections
- toxocariasis — the infection of humans with the larvae of a genus of roundworms, Toxocara, of dogs and cats. It can cause swelling of the liver and, sometimes, damage to the eyes
- trophallaxis — (among social insects) the exchange of nutriments or other secretions between members of a colony.
- vision mixer — the person who selects and manipulates the television signals from cameras, film, and other sources, to make the composite programme
- voix celeste — an organ stop having for each note two pipes tuned to slightly different pitches and producing a wavering, gentle tone.
- x consortium — A vendor consortium supporting development, evolution and maintenance of the X Window System. The X Consortium is an independent, not-for-profit company. It was formed in 1993 as the successor to the MIT X Consortium, a research group of the MIT Laboratory for Computer Science.