17-letter words containing r, i
- assistant manager — a person who assists a manager in their work
- assistant referee — An assistant referee is the same as a linesman.
- assistant teacher — a person who assists a teacher in their work or who is not yet fully qualified as a teacher
- 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.
- assyro-babylonian — of or relating to Assyria and Babylonia.
- 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).
- 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 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 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.
- 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
- 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)
- 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
- 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
- avoirdupois pound — a pound weighing 16 ounces
- axis of ordinates — y-axis (def 1).
- axis-of-ordinates — y-axis (def 1).
- 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.
- 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
- balanced literacy — a method of teaching reading in which phonics and whole language approaches are both used to maximize student learning.
- 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.