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17-letter words containing t, r, a

  • associate of arts — a degree granted especially by junior colleges after completion of two years of study. Abbreviation: A.A.
  • association fiber — any of several nerve fibers connecting different areas of the cerebral cortex in the same hemisphere.
  • associative array — (programming)   (Or "hash", "map", "dictionary") An array where the indices are not just integers but may be arbitrary strings.
  • astral projection — the departure of the astral body from the physical body, in order to travel to the astral plane
  • astronomical unit — a unit of distance used in astronomy equal to the mean distance between the earth and the sun. 1 astronomical unit is equivalent to 1.495 × 1011 metres or about 9.3 × 107 miles
  • astronomical year — year (def 4b).
  • astrophotographer — A person, especially an astronomer, who takes photographs of the stars.
  • asymmetrical bars — a set of parallel bars, having one bar fixed at 230 cm (7 ft, 6 in) and the other at 150 cm (4 ft, 11 in), used by women gymnasts
  • at close quarters — If you do something at close quarters, you do it very near to a particular person or thing.
  • at cross purposes — an opposing or contrary purpose.
  • at cross-purposes — If people are at cross-purposes, they do not understand each other because they are working towards or talking about different things without realizing it.
  • at one's own risk — If you tell someone that they are doing something at their own risk, you are warning them that, if they are harmed, it will be their own responsibility.
  • at swords' points — ready to quarrel or fight
  • at the request of — in accordance with the specific demand or wish of (someone)
  • at the service of — To be at the service of a person or organization means to be available to help or be used by that person or organization.
  • at their own game — If you beat someone at their own game, you use the same methods that they have used, but more successfully, so that you gain an advantage over them.
  • attachment theory — a set of concepts that explain the emergence of an emotional bond between an infant and primary caregiver and the way in which this bond affects the child’s behavioral and emotional development into adulthood. See also attachment (def 3a).
  • attainment target — a general defined level of ability that a pupil is expected to achieve in every subject at each key stage in the National Curriculum
  • attendance centre — (in Britain) a place at which young offenders are required to attend regularly instead of going to prison
  • attendance record — the record of how often a person has attended an institution such as a school
  • attorneys-in-fact — a person authorized by power of attorney to act on the authorizer's behalf outside a court of law.
  • attraction sphere — centrosphere (sense 1)
  • audio description — a facility provided for visually impaired people in which a film, television programme, or play is described through audio technology
  • augmented reality — an artificial environment created through the combination of real-world and computer-generated data
  • aurea mediocritas — the golden mean.
  • australia antigen — an antigen present in the blood of some persons with one form of hepatitis
  • australia current — a branch of the South Equatorial Current flowing SW from around Fiji to the E coast of Australia and then S along the coast.
  • australian ballot — an official ballot listing candidates for election to public office and issues, levies, etc., distributed inside the polling place to be marked by the voter in secret: it originated in Australia and is widely used in the U.S.
  • australian kelpie — one of an Australian breed of medium-sized sheepherding dogs having a short, harsh, straight coat in a combination of colors that can include black, red, tan, fawn, chocolate, or smoke blue, probably developed by crossbreeding between the border collie and dingo.
  • australian salute — a movement of the hand and arm made to brush flies away from one's face
  • australopithecine — any of various extinct apelike primates of the genus Australopithecus and related genera, remains of which have been discovered in southern and E Africa. Some species are estimated to be over 4.5 million years old
  • authoritativeness — having due authority; having the sanction or weight of authority: an authoritative opinion.
  • authority control — the establishment and maintainance of consistent forms of terms, as of names, subjects, and titles, to be used as headings in bibliographic records.
  • autocorrelational — Of or pertaining to autocorrelation.
  • automatic writing — writing performed without apparent intent or conscious control, especially to achieve spontaneity or uncensored expression.
  • auxiliary storage — secondary storage.
  • average deviation — a measure of dispersion, computed by taking the arithmetic mean of the absolute values of the deviations of the functional values from some central value, usually the mean or median.
  • average seek time — (storage)   The mean time it takes to move the head of a disk drive from one track to another, averaged over the source and destination cylinders. Usually measured in milliseconds (ms). The average seek time gives a good measure of the speed of the drive in a multi-user environment where successive read/write request are largely uncorrelated. Ten ms is common for a hard disk and 200 ms for an eight-speed CD-ROM.
  • aviation industry — a collective term for the companies involved in air transport
  • avogadro constant — the number of atoms or molecules in a mole of a substance
  • axis of ordinates — y-axis (def 1).
  • axis-of-ordinates — y-axis (def 1).
  • bachelor's button — any of several plants of a genus (Centaurea) of the composite family, that have scaly, vase-shaped bracts below the white, pink, or blue flowers; esp., the cornflower and knapweed
  • bachelor's-button — any of various plants with round flower heads, especially the cornflower.
  • back on the rails — If something is back on the rails, it is beginning to be successful again after a period when it almost failed.
  • background report — a report on someone or something that sheds light on their background, esp a report on the background of a person convicted of a crime before they are sentenced by a judge
  • bacteriologically — In a bacteriological manner; with respect to bacteriology.
  • bacteriorhodopsin — a purple protein containing retinal and found in the plasma membrane of certain bacteria (genus Halobacterium): it directly supplies electrochemical energy from sunlight
  • baden-wurttemberg — a state of SW Germany. Capital: Stuttgart. Pop: 53 938 (2003 est). Area: 35 742 sq km (13 800 sq miles)
  • balance of nature — the stable state in which natural communities of animals and plants exist, maintained by adaptation, competition, and other interactions between members of the communit ies and their nonliving environment
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