17-letter words containing a, c, i, f, o
- abstract of title — a summary of the ownership of land, showing the original grant, conveyances, and any incumbrances
- acetylformic acid — pyruvic acid.
- acoustic feedback — a type of feedback that is created when there is a sound loop linking an audio input and an audio output, such that a high-pitched squealing sound is produced
- act of contrition — a short prayer of penitence
- act of parliament — a law that has been passed by both of the UK Houses of Parliament and has received royal assent
- act of toleration — the statute (1689) granting religious freedom to dissenting Protestants upon meeting certain conditions.
- act of uniformity — any of the three statutes (1549, 1559, 1662) regulating public worship services in the Anglican Church, especially the act of 1662 requiring the use of the Book of Common Prayer.
- african army worm — the caterpillar of a widely distributed noctuid moth, Spodoptera exempta, which travels in vast hordes and is a serious pest of cereal crops and grasses in Africa and parts of Australia
- age of discretion — the age at which a person is considered to be able to manage his or her own affairs
- aircraft observer — U.S. Army. observer (def 4).
- aircraft-observer — someone or something that observes.
- american football — American football is a game similar to rugby that is played by two teams of eleven players using an oval-shaped ball. Players try to score points by carrying the ball to their opponents' end of the field, or by kicking it over a bar fixed between two posts.
- american foxhound — one of an American breed of medium-sized dogs having a smooth, glossy coat usually black, tan, and white in color, a square-cut muzzle, hanging ears, and a moderately high-set tail, used for hunting both in packs or individually, tailing the game by scent.
- angle of friction — the angle of a plane to the horizontal when a body placed on the plane will just start to slide. The tangent of the angle of friction is the coefficient of static friction
- antiferromagnetic — noting or pertaining to a substance in which, at sufficiently low temperatures, the magnetic moments of adjacent atoms point in opposite directions.
- apostolic fathers — the Fathers of the early Church who immediately followed the Apostles
- archconfraternity — a confraternity having the right to associate itself with confraternities that are similar to it, and to impart to them its privileges and indulgences.
- arresting officer — the police officer making an arrest
- artificial person — a human being, whether an adult or child: The table seats four persons.
- as the crow flies — If you say that a place is a particular distance away as the crow flies, you mean that it is that distance away measured in a straight line.
- 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.
- 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.
- attorneys-in-fact — a person authorized by power of attorney to act on the authorizer's behalf outside a court of law.
- axis of abscissas — x-axis (def 1).
- axis-of-abscissas — x-axis (def 1).
- biological father — the man whose semen fertilized the ovum from which a child was born
- body modification — any method of permanently adorning the body, including tattooing and piercing
- breach of promise — (formerly) failure to carry out one's promise to marry
- café-au-lait spot — a brown patch on the skin that can occur normally in small numbers or in neurofibromatosis, when they are more numerous
- california condor — either of two large, New World vultures of the family Cathartidae, Gymnogyps californianus (California condor) or Vultur gryphus (Andean condor) the largest flying birds in the Western Hemisphere: the California condor is almost extinct; the Andean condor is greatly reduced in number and rare in many areas.
- california laurel — a Pacific coast shrub or tree (Umbellularia californica) of the laurel family, having aromatic evergreen leaves and hard wood; Oregon myrtle: a source of bay leaves
- california nutmeg — a tall, pungently aromatic California evergreen tree, Torreya californica, of the yew family, having a fissured, gray-brown bark and small, purple-streaked, green fruit.
- california privet — a privet, Ligustrum ovalifolium, of the olive family, native to Japan, having glossy, oval leaves and long clusters of white flowers, widely used for hedges in the U.S.
- canadian football — a game resembling American football, played on a grass pitch between two teams of 12 players
- canarybird flower — a nasturtium, Tropaeolum peregrinum, of Peru, having round, deeply lobed leaves and yellow flowers.
- capital formation — the net additions to a capital stock in an accounting period
- carbon offsetting — a program in which a company, country, etc., reduces or offsets its carbon emissions through the funding of activities and projects that improve the environment: Carbon offsetting does not always have a quantifiable impact on the planet.
- center of gravity — The center of gravity of an object is a point in it. If this point is above the base of the object, it stays stable, rather than falling over.
- centre of gravity — The centre of gravity of an object is a point in it. If this point is above the base of the object, it stays stable, rather than falling over.
- centrifugal force — In physics, centrifugal force is the force that makes objects move outwards when they are spinning around something or travelling in a curve.
- centripetal force — a force that acts inwards on any body that rotates or moves along a curved path and is directed towards the centre of curvature of the path or the axis of rotation
- charter of rights — a section of the Canadian Constitution containing a statement of the basic rights of citizens of Canada.
- circular function — trigonometric function (def 1).
- city of gibraltar — a city on the Rock of Gibraltar, a limestone promontory at the tip of S Spain: settled by Moors in 711 and taken by Spain in 1462; ceded to Britain in 1713; a British crown colony (1830–1969), still politically associated with Britain; a naval and air base of strategic importance. Pop: 29 111 (2013 est). Area: 6.5 sq km (2.5 sq miles)
- clifden nonpareil — a handsome nocturnal moth, Catocala fraxini, that is brown with bluish patches on the hindwings: related to the red underwing
- cloverleaf aerial — a type of aerial, having three or four similar coplanar loops arranged symmetrically around an axis, to which in-phase signals are fed
- code of behaviour — the generally accepted rules governing how people behave
- code of hammurabi — a Babylonian legal code of the 18th century b.c. or earlier, instituted by Hammurabi and dealing with criminal and civil matters.
- coin of the realm — legal tender.
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