12-letter words containing a, u, r
- auditorially — Anatomy, Physiology. pertaining to hearing, to the sense of hearing, or to the organs of hearing.
- auger effect — the spontaneous emission of an electron instead of a photon by an excited ion as a result of a vacancy being filled in an inner electron shell
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- aurene glass — an iridescent American art glass colored gold and blue.
- auroral zone — the region surrounding the north or south geomagnetic pole in which the auroral phenomena take place.
- austin friar — one of the Hermits of St. Augustine.
- australasian — Australasian means belonging or relating to Australasia or to its people.
- australopith — (archaeology, anthropology, paleonotology) Of or pertaining to the extinct hominid primates, of the genus Australopithecus, from the Pleistocene period.
- austronesian — of or relating to Austronesia, its peoples, or their languages
- autapomorphy — (cladistics) A derived trait that is unique to a particular taxon.
- autarkically — In an autarkic way.
- authorizable — able to be authorized
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.
- autoanalyzer — any of various automatic devices that test and analyze chemicals, blood, etc.
- autochangers — Plural form of autochanger.
- autocratical — Autocratic.
- autocritique — the examination of factors guiding one's thoughts, beliefs and actions; self-criticism
- autodestruct — likely to or possessing the power to destroy or obliterate itself or its possessor
- autodiallers — Plural form of autodialler.
- autoexposure — A device that sets the exposure automatically on a camera or other piece of equipment.
- autographing — Present participle of autograph.
- autoinjector — A medical device designed to deliver a single dose of a particular, typically life-saving, drug.
- automorphism — the practice of seeing others as having the same characteristics as oneself
- autoreactive — (immunology, medicine) Acting against the organism by which it was produced.
- autorhythmic — That generates its own rhythm.
- autorickshaw — (in India) a light three-wheeled vehicle driven by a motorcycle engine
- autorotation — the continuous rotation of a body in an airflow, such as that of the rotor blades of a helicopter in an unpowered descent
- avariciously — characterized by avarice; greedy; covetous.
- avascularity — the condition of having few blood vessels or of being without blood vessels
- averruncator — a long pair of shears used for pruning the higher branches of trees
- aviculturist — A person who keeps and rears (breeds) birds.
- avuncularity — the condition of being an uncle
- axe-murderer — someone who commits murderer with an axe
- axillary bud — a bud that is borne at the axil of a leaf and is capable of developing into a branch shoot or flower cluster.
- baba au rhum — a light cake raised with yeast, containing raisins and dried fruits and soaked in a rum syrup
- baby-bouncer — a seat on springs suspended from a door frame, etc, in which a baby may be placed for exercise
- baccalaurean — of a baccalaureate
- baccalauréat — (esp in France) a school-leaving examination that qualifies the successful candidates for entrance to university
- bach trumpet — a modern small three-valved trumpet for playing clarino passages in Bach's music
- back country — The back country is an area that is a long way from any city and has very few people living in it.
- backcourtman — any of the players stationed in the backcourt; a guard
- backgrounded — Simple past tense and past participle of background.
- backgrounder — A backgrounder is a short article in a newspaper or magazine that provides background information about a particular subject.
- backpressure — a resistant pressure exerted by liquid or gas against the forward motion or flow of an exhaust or pipe system: Careful control of backpressure ensures an even supply of oil from the well.
- badger skunk — hog-nosed skunk (def 1).
- badger-skunk — Also called badger skunk, rooter skunk. a large, naked-muzzled skunk, Conepatus mesoleucus, common in the southwestern U.S. and Mexico, having a black coat with one broad white stripe down the back and tail.
- ball turning — the turning of arms or legs on furniture to make them resemble a continuous row of balls.
- baluchithere — a hornless rhinoceros of the extinct genus Baluchitherium that inhabited central Asia during the Oligocene and early Miocene epochs: the largest land mammal known.
- banana shrub — a tall Chinese shrub, Michelia figo, of the magnolia family, having cream-yellow flowers with a reddish edge and a strong banana odor.
- banbury cake — a cake consisting of a pastry base filled with currants, raisins, candied peel, and sugar, with a crisscross pattern on the top