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21-letter words containing o, c, t, r, e, i

  • 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
  • metabotropic receptor — an indirect receptor which initiates an intracellular biochemical cascade after it is triggered by an agonistic ligand
  • 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.
  • 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
  • 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.
  • 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.
  • nuclear cross section — cross section (def 7).
  • nuclear power station — a station or plant where nuclear energy is converted into heat, electricity, etc
  • objective correlative — a completely depicted situation or chain of events that objectifies a particular emotion in such a way as to produce or evoke that emotion in the reader.
  • 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 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.
  • optical double (star) — double star (sense 2)
  • 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).
  • overcurrent detection — Overcurrent detection is a method of establishing that the value of current in a circuit exceeds a particular value for a particular length of time.
  • painter and decorator — a person who paints and decorates houses as a trade
  • paradoxical intention — (in psychotherapy) the deliberate practice of a neurotic habit or thought, undertaken in order to remove it
  • partial reinforcement — the process of randomly rewarding an organism for making a response on only some of the occasions it makes it
  • partition coefficient — the ratio of the concentrations of a substance in two heterogenous phases in equilibrium with each other
  • path coverage testing — (testing)   Testing a program by examining which lines of executable code are visited (as in code coverage testing) and also the ways of getting to each line of code and the subsequent sequence of execution. Path coverage testing is the most comprehensive type of testing that a test suite can provide. It can find more bugs, especially those that are caused by data coupling. However, path coverage is hard and usually only used for small and/or critical sections of code.
  • pathfinder prospectus — a prospectus regarding the flotation of a new company that contains only sufficient details to test the market reaction
  • percussion instrument — a musical instrument, as the drum, cymbal, triangle, xylophone, or piano, that is struck to produce a sound, as distinguished from string or wind instruments.
  • performance indicator — a quantitative or qualitative measurement, or any other criterion, by which the performance, efficiency, achievement, etc of a person or organization can be assessed, often by comparison with an agreed standard or target
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