13-letter words containing x, a, n
- rotation axis — an imaginary line through a crystal about which the crystal may be rotated a specified number of degrees and be brought back to its original position.
- rotation-axes — a process of replacing the axes in a Cartesian coordinate system with a new set of axes making a specified angle with and having the same origin as the original axes.
- roxas y acuña — Manuel (maˈnwel). 1892–1948, Philippine statesman; first president of the Republic of the Philippines (1946–48)
- saint-exupery — Antoine de [ahn-twan duh] /ɑ̃ˈtwan də/ (Show IPA), 1900–45, French author and aviator.
- saxony-anhalt — a state in central Germany. 9515 sq. mi. (24,644 sq. km). Capital: Magdeburg.
- severance tax — a tax levied by a state on the extraction and use of a natural product, as coal, that is sold outside the state or during a certain period.
- sex addiction — an addiction to sexual activity
- sex chromatin — Barr body.
- sex education — Sex education is education in schools on the subject of sexual activity and sexual relationships.
- sexploitation — the exploitation of sex in films, magazines, etc.
- sexualization — to render sexual; endow with sexual characteristics.
- shadow boxing — to make the motions of attack and defense, as in boxing, as a training or conditioning procedure.
- six-yard line — the line marking the limits of the goal area
- soixante-neuf — sixty-nine (def 4).
- spermatotoxin — spermotoxin.
- stannic oxide — a white, amorphous, water-insoluble powder, SnO 2 , used chiefly in the manufacture of ceramic glazes and glass, and of polishing powders for metal, glass, and marble.
- tax allowance — amount of income left untaxed
- tax avoidance — Tax avoidance is the use of legal methods to pay the smallest possible amount of tax.
- tax deduction — an expenditure that is deducted from taxable income.
- tax exemption — immunity from paying tax
- tax incentive — measure to encourage activity
- tax inspector — a government official whose job is to make sure that people and companies are paying the right amount of tax
- taxonomically — the science or technique of classification.
- texas rangers — a member of the Texas state police force or, especially formerly, of the mounted state police.
- texture paint — a finish paint having an insoluble additive, as sand, for giving a slightly rough textural effect.
- titanic oxide — a white, water-insoluble powder, TiO 2 , used chiefly in white pigments, plastics, ceramics, and for delustering synthetic fibers.
- unexaggerated — not exaggerated or overblown
- unexceptional — not exceptional; not unusual or extraordinary.
- unexpectantly — having expectations; expecting: an excited, expectant audience.
- unexplainable — to make plain or clear; render understandable or intelligible: to explain an obscure point. Synonyms: explicate. Antonyms: confuse.
- unexplainably — to make plain or clear; render understandable or intelligible: to explain an obscure point. Synonyms: explicate. Antonyms: confuse.
- unexplanatory — serving to explain: an explanatory footnote.
- unextractable — to get, pull, or draw out, usually with special effort, skill, or force: to extract a tooth.
- unix man page — Unix manual page
- uranium oxide — any of the compounds of uranium and oxygen, as UO 2 , UO 3 , U 4 O 9 , or U 3 O 8 .
- victorian box — a tree, Pittosporum undulatum, of Australia, having shiny, wavy-margined, oblong leaves and fragrant clusters of yellowish flowers.
- xanthochroism — a condition in certain animals, esp aquarium goldfish, in which all skin pigments other than yellow and orange disappear
- xanthochroous — light-skinned and fair-haired
- xenodiagnosis — a method of diagnosing certain diseases caused by insects, ticks, or other vectors, by allowing uninfected vectors to feed on the patient and later examining them for infections.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- zooxanthellae — any of various symbiotic yellow-green or yellow–brown algae in the cytoplasm of certain radiolarians and marine invertebrates.