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18-letter words containing r, i

  • associative cortex — the part of the cortex that does not have direct connections to the senses or motor system and is thought to be involved in higher mental processes
  • associative memory — content addressable memory
  • 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).
  • assumption of risk — Assumption of risk is the practice of paying for minor losses yourself, but protecting against catastrophic losses by buying insurance cover.
  • ast research, inc. — (company)   A company, formed some time before 1980, that was a leading personal computer manufacturer. AST developed desktop computers, mobile computers, and servers that were sold in more than 100 countries worldwide. In January 1999 the name and intellectual property were acquired by a new company named AST Computers, LLC. As of 2000-03-02 it was trading as ARI Service.
  • astrological chart — map of constellations at certain time
  • astrometric binary — a binary star that can be recognized as such because of its undulating proper motion.
  • astronomical clock — a complex clock showing astronomical phenomena, such as the phases of the moon
  • asymmetric warfare — warfare in which opposing groups or nations have unequal military resources, and the weaker opponent uses unconventional weapons and tactics, as terrorism, to exploit the vulnerabilities of the enemy.
  • asymptotic freedom — a property of the force between quarks, according to quantum chromodynamics, such that they behave almost like free particles when they are close together within a hadron.
  • asynchronous logic — (architecture)   A data-driven circuit design technique where, instead of the components sharing a common clock and exchanging data on clock edges, data is passed on as soon as it is available. This removes the need to distribute a common clock signal throughout the circuit with acceptable clock skew. It also helps to reduce power dissipation in CMOS circuits because gates only switch when they are doing useful work rather than on every clock edge. There are many kinds of asynchronous logic. Data signals may use either "dual rail encoding" or "data bundling". Each dual rail encoded Boolean is implemented as two wires. This allows the value and the timing information to be communicated for each data bit. Bundled data has one wire for each data bit and another for timing. Level sensitive circuits typically represent a logic one by a high voltage and a logic zero by a low voltage whereas transition signalling uses a change in the signal level to convey information. A speed independent design is tolerant to variations in gate speeds but not to propagation delays in wires; a delay insensitive circuit is tolerant to variations in wire delays as well. The purest form of circuit is delay-insensitive and uses dual-rail encoding with transition signalling. A transition on one wire indicates the arrival of a zero, a transition on the other the arrival of a one. The levels on the wires are of no significance. Such an approach enables the design of fully delay-insensitive circuits and automatic layout as the delays introduced by the layout compiler can't affect the functionality (only the performance). Level sensitive designs can use simpler, stateless logic gates but require a "return to zero" phase in each transition.
  • at sb's right hand — If someone is at a person's right hand, they work closely with that person so they can help and advise them.
  • at the risk of sth — If you do something at the risk of something unpleasant happening, you do it even though you know that the unpleasant thing might happen as a result.
  • 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.
  • athletic supporter — jockstrap
  • 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 figures — the number of people present at events such as football matches or concerts
  • 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
  • auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
  • augmented interval — an interval that is a half step greater than the corresponding major or perfect interval
  • australian doubles — an unusual formation in doubles in which the server's partner is positioned on the same side of the court as the server.
  • australian terrier — a small wire-haired breed of terrier similar to the cairn
  • australopithecines — Plural form of australopithecine.
  • authorized capital — the total amount of value of the shares that a company is allowed to distribute
  • authorized version — the revised English translation of the Bible published in England in 1611 with the authorization of King James I
  • autobiographically — In a autobiographical manner.
  • autogenic training — a technique for reducing stress through mental exercises to produce physical relaxation
  • automatic exposure — the automatic adjustment of the lens aperture and shutter speed of a camera by a control mechanism
  • automatic tracking — a radar tracking system in which an automatic device uses the echo signal from the tracked object to keep the radar constantly beamed on target and to compute the range of the object.
  • auxiliary equation — characteristic equation (def 1b).
  • auxiliary language — a language, as Esperanto, Swahili, or English, used for intercommunication by speakers of various other languages.
  • auxiliary-equation — Mathematics. the characteristic polynomial of a given matrix, equated to zero. Also called auxiliary equation. an equation with one variable and equated to zero, which is derived from a given linear differential equation and in which the coefficient and power of the variable in each term correspond to the coefficient and order of a derivative in the original equation.
  • aviation authority — a body that is responsible for overseeing the aviation industry
  • aviation insurance — Aviation insurance is insurance cover for aircraft, and for damage, injury, or loss of life or cargo while traveling on aircraft.
  • avoirdupois weight — a British and American system of weights based on a pound of 16 ounces
  • axis of revolution — an axis in a plane, about which an area is revolved to form a solid of revolution.
  • background reading — reading of related works in order to get contextual information on a topic that you are intending to study or write about
  • ballistocardiogram — a tracing made by a ballistocardiograph
  • bargaining counter — A bargaining counter is the same as a bargaining chip.
  • baritone saxophone — the second lowest instrument in the family of saxophones
  • barium thiosulfate — a white, crystalline, water-insoluble, poisonous solid, BaS 2 O 3 ⋅H 2 O, used chiefly in the manufacture of explosives, matches, paints, and varnishes.
  • bartholin's glands — two small reddish-yellow glands, one on each side of the vaginal orifice, that secrete a mucous lubricating substance during sexual stimulation in females
  • bats-in-the-belfry — a hairy Eurasian campanulaceous plant, Campanula trachelium, with bell-shaped blue-purple flowers
  • battery eliminator — eliminator (def 2).
  • battery-eliminator — a person or thing that eliminates.
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