12-letter words containing x, i, o
- retroflexion — a bending backward.
- 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
- tetrodotoxin — a neurotoxin, C 11 H 17 N 3 O 3 , occurring in a species of puffer fish: ingestion of the toxin is usually rapidly fatal due to heart failure or asphyxiation; used experimentally to block impulse conduction potential in excitable cells.
- text edition — that edition of a book prepared for use in schools or colleges
- thioxanthene — any of a class of antipsychotics, as thiothixene, used to relieve symptoms of severe psychiatric disorders.
- toxic effect — an adverse effect of a drug produced by an exaggeration of the effect that produces the therapeutic response
- toxicophobia — an intense fear of poisoning
- toxigenicity — the quality of being toxigenic
- 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
- toxophilitic — of or relating to a person who loves archery
- trophallaxis — (among social insects) the exchange of nutriments or other secretions between members of a colony.
- tumbling box — a box, pivoted at two corners, used in the manner of a tumbling barrel.
- twin paradox — a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
- underexploit — to make insufficient use of
- uranic oxide — uranium dioxide.
- vexillologic — of or relating to vexillology
- 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.
- vox angelica — an organ stop with a soft tone, often similar to the voix céleste
- 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.
- xanthochroia — a condition causing yellow patches on the skin similar to xanthoma
- xanthochroid — of, relating to, or designating races having light-coloured hair and a pale complexion
- xanthopterin — a yellow pigment, C6H5N5O2, found in some butterfly or moth wings or in the urine of mammals
- xenoreactive — (immunology) That generates a reaction to material from another species.