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21-letter words containing r, e, c, o, n

  • main-topsail schooner — a two-masted or three-masted schooner having square topsails on the foremast and mainmast: a jackass brig or jackass bark.
  • manufacturing process — chain of production
  • mariage de convenance — marriage entered into for a personal or family advantage, as for social, political, or economic reasons, usually without love and sometimes without the expectation of sexual relations.
  • mean time to recovery — (specification)   (MTTR) The average time that a device will take to recover from a non-terminal failure. Examples of such devices range from self-resetting fuses (where the MTTR would be very short, probably seconds), up to whole systems which have to be replaced. The MTTR would usually be part of a maintenance contract, where the user would pay more for a system whose MTTR was 24 hours, than for one of, say, 7 days. This means the supplier is guaranteeing to have the system up and running again within 24 hours (or 7 days) of being notified of the failure. Some devices have a MTTR of zero, which means that they have redundant components which can take over the instant the primary one fails, see RAID for example. See also Mean Time Between Failures.
  • mechanical solidarity — social cohesiveness that is based on shared activities, beliefs, and experiences and is characteristic of simple traditional societies.
  • medium access control — Media Access Control
  • meter-kilogram-second — of or relating to the system of units in which the meter, kilogram, and second are the principal units of length, mass, and time. Abbreviation: mks, MKS.
  • metopon hydrochloride — a narcotic drug, C18H21O3N·HCl, derived from morphine, but slightly more potent: used in medicine to relieve pain
  • metropolitan district — any of the districts making up the metropolitan counties of England: since 1986 they have functioned as unitary authorities, forming the sole principal tier of local government. Each metropolitan district has an elected council responsible for education, social services, etc
  • microware corporation — Authors of OS-9. Address: Des Moines, Iowa, USA.
  • minister of the crown — any Government minister of cabinet rank
  • model-view-controller — (programming)   (MVC) A way of partitioning the design of interactive software; a software architecture pattern. The "model" is the internal workings of the program (the data objects and algorithms), the "view" is how the user sees the state of the model and the "controller" is how the user changes the state or provides input. MVC was the original kind of what is now sometimes called an MV* pattern. Trygve Reenskaug introduced it into Smalltalk-76 while visiting Xerox PARC in the 1970s.
  • modern apprenticeship — an arrangement that allows a school leaver to gain vocational qualifications while being trained in a job
  • monochloroacetic acid — chloroacetic acid.
  • motion-picture camera — a sequence of consecutive pictures of objects photographed in motion by a specially designed camera (motion-picture camera) and thrown on a screen by a projector (motion-picture projector) in such rapid succession as to give the illusion of natural movement.
  • motivational research — the application of the knowledge and techniques of the social sciences, especially psychology and sociology, to understanding consumer attitudes and behavior: used as a guide in advertising and marketing.
  • multi-ringed compound — A multi-ringed compound is a compound which has 70 or more carbon atoms, often a residual compound.
  • multilayer perceptron — A network composed of more than one layer of neurons, with some or all of the outputs of each layer connected to one or more of the inputs of another layer. The first layer is called the input layer, the last one is the output layer, and in between there may be one or more hidden layers.
  • munchausen's syndrome — a mental disorder in which a patient feigns illness to obtain hospital treatment
  • narrow-angle glaucoma — Ophthalmology. angle-closure glaucoma. See under glaucoma.
  • national park service — a division of the Department of the Interior, created in 1916, that administers national parks, monuments, historic sites, and recreational areas.
  • necrotising fasciitis — a disease caused by the bacterium streptococcus pyogenes, in which the fasciae of the muscles or other organs become inflamed, resulting in rapid destruction of overlying tissues
  • needs no introduction — If you say that someone or something needs no introduction, you mean that they are so well known that everyone knows who or what they are.
  • negative prescription — the barring of adverse claims to property, etc, after a specified period of time has elapsed, allowing the possessor to acquire title
  • negotiable securities — securities that are legally transferable in title from one party to another
  • nellis air force base — the largest air base in the U.S. Air Force's Tactical Air Command, located near Las Vegas, Nev., and developed from what began in 1941 as a U.S. Army Air Corps field.
  • netware core protocol — (networking)   (NCP) A Novell trademark for the protocol used to access Novell NetWare file and print service functions. It uses an underlying IPX or IP transport protocol.
  • network time protocol — (NTP) A protocol built on top of TCP/IP that assures accurate local timekeeping with reference to radio, atomic or other clocks located on the Internet. This protocol is capable of synchronizing distributed clocks within milliseconds over long time periods. It is defined in STD 12, RFC 1119.
  • new general catalogue — NGC.
  • night-blooming cereus — any of various cacti of the genera Hylocereus, Peniocereus, Nyctocereus, or Selenicereus, having large, usually white flowers that open at night.
  • non-repeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • nonexamination course — a course of study in which there are no examinations
  • nonexecutive director — a director of a commercial company who is not a full-time member of the company but is brought in to advise the other directors
  • nonproportional cover — Nonproportional cover is reinsurance cover such as excess of loss reinsurance where the reinsurer's liability is not calculated as a proportion of the insurance.
  • nonrestrictive clause — a relative clause that describes or supplements but is not essential in establishing the identity of the antecedent and is usually set off by commas in English. In This year, which has been dry, is bad for crops the clause which has been dry is a nonrestrictive clause.
  • nonviolent resistance — passive resistance, peaceful protest
  • north atlantic treaty — the treaty (1949) signed by 12 countries, providing for the establishment of NATO.
  • north pacific current — a warm current flowing eastward across the Pacific Ocean.
  • not care a hang about — to not care the least bit about
  • nuclear cross section — cross section (def 7).
  • nuclear power station — a station or plant where nuclear energy is converted into heat, electricity, etc
  • oblique circular cone — a cone whose surface is generated by lines joining a fixed point to the points of a circle, the fixed point lying on a line that is not perpendicular to the circle at its center.
  • old spanish practices — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
  • one-point perspective — a mathematical system for representing three-dimensional objects and space on a two-dimensional surface by means of intersecting lines that are drawn vertically and horizontally and that radiate from one point (one-point perspective) two points (two-point perspective) or several points on a horizon line as perceived by a viewer imagined in an arbitrarily fixed position.
  • open graphics library — (graphics, library)   (OpenGL) A multi-platform software interface to graphics hardware, supporting rendering and imaging operations. The OpenGL interface was developed by Silicon Graphics, who license it to other vendors. The OpenGL graphics interface consists of several hundred functions operating on 2D and 3D objects, supporting basic techniques, such as modelling and smooth shading, and advanced techniques, such as texture mapping and motion blur. Many operations require a frame buffer. OpenGL is network-transparent, and a common extension to the X Window System allows an OpenGL client to communicate across a network with a different vendor's OpenGL server. OpenGL is based on Silicon Graphics' proprietary IRIS GL.
  • open telecom platform — (communications, library)   (OTP) A set of standard, open source libraries and tools for use with Erlang.
  • open trading protocol — Internet Open Trading Protocol
  • operational semantics — (theory)   A set of rules specifying how the state of an actual or hypothetical computer changes while executing a program. The overall state is typically divided into a number of components, e.g. stack, heap, registers etc. Each rule specifies certain preconditions on the contents of some components and their new contents after the application of the rule. It is similar in spirit to the notion of a Turing machine, in which actions are precisely described in a mathematical way. Compuare axiomatic semantics, denotational semantics.
  • ortho-dichlorobenzene — a colorless liquid with a pleasant odor, C 6 H 4 Cl 2 , used as a solvent for a wide range of organic materials.
  • orthogonal projection — a two-dimensional graphic representation of an object in which the projecting lines are at right angles to the plane of the projection. Also called orthogonal projection. Compare isometric (def 5).
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