17-letter words containing n, 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
- audubon's warbler — a common North American wood warbler, Dendroica coronata, having yellow spots on the rump, crown, and sides, including a white-throated eastern subspecies (myrtle warbler) and a yellow-throated western subspecies (Audubon's warbler)
- augmented reality — an artificial environment created through the combination of real-world and computer-generated data
- 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.
- 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.
- autonomous syntax — an approach of generative grammar in which the syntactic component of a grammar is viewed as existing or operating independently of the semantic component and abstract syntactic representation is not equivalent to semantic representation.
- autonomous system — (networking, routing) (AS) A collection of routers under a single administrative authority, using a common Interior Gateway Protocol for routing packets.
- autosensitization — autoimmunization.
- 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.
- 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
- avogadro constant — the number of atoms or molecules in a mole of a substance
- avogadro's number — the constant, 6.022 × 10 23 , representing the number of atoms, molecules, or ions in one mole of a substance. Symbol: N. Compare gram-atom, gram molecule.
- avoirdupois pound — a pound weighing 16 ounces
- axis of ordinates — y-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
- 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
- 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.
- 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)
- 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.
- 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
- balance of terror — military deterrence based on the possession of weapons of mass destruction by opponents in a conflict
- balance the books — do accounting
- balanced literacy — a method of teaching reading in which phonics and whole language approaches are both used to maximize student learning.
- balanced sentence — a sentence consisting of two or more clauses that are parallel in structure.
- bald-faced hornet — any large, stinging paper wasp of the family Vespidae, as Vespa crabro (giant hornet) introduced into the U.S. from Europe, or Vespula maculata (bald-faced hornet or white-faced hornet) of North America.
- banana phenomenon — banana problem