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18-letter words containing a, e, o, n, i

  • american brooklime — any of various speedwells found along brooks, in marshes, etc., as Veronica americana (American brooklime) a creeping plant having leafy stems and loose clusters of small blue flowers.
  • american chameleon — anole: lizards of this type (family Iguanidae) are incorrectly called “chameleons”
  • american cockroach — a large, reddish-brown cockroach, Periplaneta americana, found originally in the southern U.S. but now widely distributed.
  • ammonium carbamate — a white soluble crystalline compound produced by reaction between dry ammonia and carbon dioxide and used as a nitrogen fertilizer. Formula: (NH4)CO2NH2
  • ammonium carbonate — an unstable pungent soluble white powder that is a double salt of ammonium bicarbonate and ammonium carbamate: used in the manufacture of baking powder, smelling salts, and ammonium compounds. Formula: (NH4)HCO3.(NH4)CO2NH2
  • ammonium hydroxide — a compound existing only in aqueous solution, formed when ammonia dissolves in water to form ammonium ions and hydroxide ions. Formula: NH4OH
  • ammonium phosphate — monoammonium phosphate.
  • ammonium purpurate — murexide.
  • an overgrown child — an adult whose behaviour is characteristic of a child
  • analogue recording — a sound recording process in which an audio input is converted into an analogous electrical waveform
  • andorre la vieille — French name for the capital of Andorra, situated in the west of the principality. Pop: 22 035 (2003 est)
  • angiotensinogenase — (enzyme) renin.
  • angle of deviation — the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another
  • angle of elevation — elevation (def 8a).
  • angle of incidence — the angle that a line or beam of radiation makes with the normal to the surface at the point of incidence
  • angular dispersion — a measure of the angular separation of light rays of different wavelength or color traversing a prism or diffraction grating, equal to the rate of change of the angle of deviation with respect to the change in wavelength.
  • anterior pituitary — a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth and that secretes growth hormone, LH, FSH, ACTH, TSH, and MSH, a posterior region ((posterior pituitary) or (neurohypophysis)) that develops from the back of the forebrain and that secretes the hormones vasopressin and oxytocin, and an intermediate part (pars intermedia) derived from the anterior region but joined to the posterior region, that secretes the hormone MSH in lower vertebrates.
  • anthropocentricity — the state or quality of being anthropocentric.
  • anti-commercialism — the principles, practices, and spirit of commerce.
  • anti-miscegenation — marriage or cohabitation between two people from different racial groups, especially, in the U.S., between a black person and a white person: In 1968 the Supreme Court ruled unanimously that state laws prohibiting miscegenation were unconstitutional.
  • anti-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
  • anticholinesterase — any of a group of substances that inhibit the action of cholinesterase
  • anticipated profit — the profit that one expects to make from a deal, transaction, or project
  • antiferromagnetism — the phenomenon exhibited by substances that resemble paramagnetic substances in the value of their relative permeability but that behave like ferromagnetic substances when their temperature is varied
  • antimony pentoxide — a white or yellowish, water-insoluble powder, Sb 2 O 5 , used chiefly in the synthesis of antimonates.
  • antisegregationist — opposed to the segregation of different races in any human activity
  • antivirus software — (tool)   Programs to detect and remove computer viruses. The simplest kind scans executable files and boot blocks for a list of known viruses. Others are constantly active, attempting to detect the actions of general classes of viruses. antivirus software should always include a regular update service allowing it to keep up with the latest viruses as they are released.
  • antivivisectionist — a person who is opposed to vivisection
  • appellate division — the section of a court that hears appeals, sometimes existing as an intermediate court between a trial court and a court of last resort.
  • application server — 1. A designer's or developer's suite of software that helps programmers isolate the business logic in their programs from the platform-related code. Application servers can handle all of the application logic and connectivity found in client-server applications. Many application servers also offer features such as transaction management, clustering and failover, and load balancing; nearly all offer ODBC support. 2. Production programs run on a mid-sized computer that handle all application operations between browser-based computers and an organisation's back-end business applications or databases. The application server works as a translator, allowing, for example, a customer with a browser to search an online retailer's database for pricing information. 3. The device on which application server software runs. Application Service Providers offer commercial access to such devices.
  • arbitration clause — a clause in a contract laying down that disputes between the parties should be settled by arbitration
  • aristotelian logic — the logical theories of Aristotle as developed in the Middle Ages, concerned mainly with syllogistic reasoning: traditional as opposed to modern or symbolic logic
  • aristotles-lantern — a complex arrangement of muscles and calcareous teeth and plates forming an eversible organ in most echinoids, functioning in mastication.
  • armed intervention — an official response to a situation which involves the armed forces
  • assignment problem — (mathematics, algorithm)   (Or "linear assignment") Any problem involving minimising the sum of C(a, b) over a set P of pairs (a, b) where a is an element of some set A and b is an element of set B, and C is some function, under constraints such as "each element of A must appear exactly once in P" or similarly for B, or both. For example, the a's could be workers and the b's projects. The problem is "linear" because the "cost function" C() depends only on the particular pairing (a, b) and is independent of all other pairings.
  • associated company — a company which is largely controlled by its parent company because the latter owns anything up to 50% of the shares
  • association cortex — any of the regions of the cerebral cortex of the brain connected by numerous nerve fibers to all parts of both cerebral hemispheres and coordinating such higher activities as learning and reasoning.
  • assortative mating — the reproductive pairing of individuals that have more traits in common than would likely be the case if mating were random (contrasted with disassortative mating).
  • astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
  • at one's wit's end — the last part or extremity, lengthwise, of anything that is longer than it is wide or broad: the end of a street; the end of a rope.
  • at one's wits' end — at a loss to know how to proceed
  • at the instance of — at the suggestion or instigation of
  • at your fingertips — If you say that something is at your fingertips, you approve of the fact that you can reach it easily or that it is easily available to you.
  • at/from a distance — If you are at a distance from something, or if you see it or remember it from a distance, you are a long way away from it in space or time.
  • atmospheric engine — an early form of single-acting engine in which the power stroke is provided by atmospheric pressure acting upon a piston in an exhausted cylinder.
  • atmospheric window — wavelengths of the electromagnetic spectrum that can be transmitted through the earth's atmosphere. Atmospheric windows occur in the visible, infrared, and radio regions of the spectrum
  • attendance officer — someone whose job is to keep records of students' attendance at school and to encourage students to attend
  • attention-grabbing — An attention-grabbing remark or activity is one that is intended to make people notice it.
  • attribution theory — the theory that tries to explain how people link actions and emotions to particular causes, both internal and external
  • audio conferencing — the practice of conducting meetings by the use of audio telecommunications
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