17-letter words containing i, a
- attraction sphere — centrosphere (sense 1)
- audience research — research into the make-up and habits of the audience of a particular television or radio programme or network
- audio description — a facility provided for visually impaired people in which a film, television programme, or play is described through audio technology
- audio-visual aids — training or educational materials directed at both the sense of hearing and the sense of sight; films, recordings, photographs, etc., used in classroom instruction, library collections, or the like.
- 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.
- autocatalytically — In an autocatalytic manner.
- autocorrelational — Of or pertaining to autocorrelation.
- automated testing — (testing) Software testing assisted with software tools that require no operator input, analysis, or evaluation.
- automatic vending — selling goods by vending machines
- automatic writing — writing performed without apparent intent or conscious control, especially to achieve spontaneity or uncensored expression.
- autosensitization — autoimmunization.
- 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
- aviation medicine — the branch of medicine concerned with the effects on man of flight in the earth's atmosphere
- avoirdupois pound — a pound weighing 16 ounces
- axis of abscissas — x-axis (def 1).
- axis of ordinates — y-axis (def 1).
- axis-of-abscissas — x-axis (def 1).
- axis-of-ordinates — y-axis (def 1).
- babe in the woods — a baby or child.
- babi yar symphony — a symphony (1962) by Dimitri Dimitrievich Shostakovich.
- babinski's reflex — a reflex extension of the great toe with flexion of the other toes, evoked by stroking the sole of the foot: normal in infants but otherwise denoting central nervous system damage.
- baby doll nightie — a short, frilly nightdress
- 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.
- backward analysis — (theory) An analysis to determine properties of the inputs of a program from properties or context of the outputs. E.g. if the output of this function is needed then this argument is needed. Compare forward analysis.
- backward chaining — (algorithm) An algorithm for proving a goal by recursively breaking it down into sub-goals and trying to prove these until facts are reached. Facts are goals with no sub-goals which are therefore always true. Backward training is the program execution mechanism used by most logic programming language like Prolog. Opposite: forward chaining.
- bacon's rebellion — an unsuccessful uprising by frontiersmen in Virginia in 1676, led by Nathaniel Bacon against the colonial government in Jamestown.
- 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
- baggage screening — the procedure whereby baggage is electronically screened at an airport before it is allowed on the plane
- bahia de cochinos — Spanish name of Bay of Pigs.
- baile atha cliath — Dublin
- baile-atha-cliath — Gaelic Baile Àtha Cliath. a seaport in and the capital of the Republic of Ireland, in the E part, on the Irish Sea.
- balanced literacy — a method of teaching reading in which phonics and whole language approaches are both used to maximize student learning.
- ballistic missile — a missile that has no wings or fins and that follows a ballistic trajectory when its propulsive power is discontinued
- baltimore clipper — a small, fast American sailing vessel of the early 19th century, having a sharp hull form and two masts with a pronounced rake and carrying a brig or schooner rig.
- banking principle — the principle that bank notes are a form of credit and should be issued freely in order to maintain an elastic currency.
- bar-tailed godwit — a large wader, Limosa lapponica, of the family Scolopacidae which, in migrating from Alaska to New Zealand, makes the longest journey without stopping for food taken by any animal
- barbed wire fence — a fence constructed from strong wire that has sharply pointed barbs at close intervals along its length