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21-letter words starting with m

  • 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 instrument — a musical instrument, such as a barrel organ or music box, that plays a preselected piece of music by mechanical means
  • mechanical metallurgy — the branch of metallurgy dealing with the response of metals to applied forces.
  • mechanical solidarity — social cohesiveness that is based on shared activities, beliefs, and experiences and is characteristic of simple traditional societies.
  • mechanical suspension — the act of suspending.
  • mechanical weathering — any of the various weathering processes that cause physical disintegration of exposed rock without any change in the chemical composition of the rock: Collision between rock surfaces can cause mechanical weathering.
  • medical jurisprudence — forensic medicine.
  • medical social worker — a person who works in a hospital and is responsible for offering counselling to patients and their families and ensuring that discharged patients will receive appropriate care in the community
  • mediterranean climate — a climate characterized by warm, dry summers and rainy winters
  • medium access control — Media Access Control
  • medium dry white wine — Medium dry white wine is white wine that is not very sweet.
  • megaloblastic anaemia — any anaemia, esp pernicious anaemia, characterized by the presence of megaloblasts in the blood or bone marrow
  • megaspore mother cell — a diploid cell in plants that undergoes meiosis to create four haploid megaspores.
  • member of the wedding — a novel (1946) and play (1950) by Carson McCullers.
  • mengistu haile mariam — born 1937, Ethiopian political leader: head of state 1977–87; president 1987–91.
  • 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.
  • methylisothiazolinone — (chemistry) A powerful biocide and preservative within the group of isothiazolinones, used in shampoos etc.
  • methyltrinitrobenzene — TNT.
  • 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
  • microsoft corporation — (company)   The biggest supplier of operating systems and other software for IBM PC compatibles. Software products include MS-DOS, Microsoft Windows, Windows NT, Microsoft Access, LAN Manager, MS Client, SQL Server, Open Data Base Connectivity (ODBC), MS Mail, and SNA Server for Windows NT. Microsoft was founded as "Micro-soft" in 1975 by Bill Gates (now CEO) and his high school pal Paul Allen. Their first product was a version of BASIC for the new Altair computer [which one?]. In 1980, IBM chose Microsoft to supply the operating system for the IBM PC. On the UK television program "The Net" in May 1994, Bill Gates said he was betting his company on the information highway". Quarterly sales $1293M, profits $362M (Aug 1994).
  • microware corporation — Authors of OS-9. Address: Des Moines, Iowa, USA.
  • miniature photography — photography with a camera using film that is 35 millimeters wide or less.
  • minister of the crown — any Government minister of cabinet rank
  • mistress of the robes — (in Britain) a lady of high rank in charge of the Queen's wardrobe
  • 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
  • modulus of elasticity — the ratio of the stress applied to a body or substance to the resulting strain within the elastic limit
  • mohammed reza pahlavi — 1919-80; shah of Iran (1941-79); deposed
  • monochloroacetic acid — chloroacetic acid.
  • mother-of-pearl cloud — nacreous cloud.
  • mother-of-pearl glass — an American art glassware having colored glass set into indentations in a thickness of opaque glass, the whole covered with clear glass and etched slightly with acid.
  • motherwell and wishaw — a burgh in the Motherwell district, in S Scotland.
  • 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.
  • motor neurone disease — Motor neurone disease is a disease which destroys the part of a person's nervous system that controls movement.
  • motoring organization — an organization concerning cars and other vehicles, providing insurance, assistance in case of a breakdown, etc
  • move heaven and earth — the abode of God, the angels, and the spirits of the righteous after death; the place or state of existence of the blessed after the mortal life.
  • mucopolysaccharidoses — Plural form of mucopolysaccharidosis.
  • mucopolysaccharidosis — Any of a group of metabolic disorders caused by the absence or malfunction of lysosomal enzymes needed to break down glycosaminoglycans.
  • muhammad al-khwarizmi — Muhammad ibn Musa al-Khwarizmi
  • muhammad riza pahlavi — Pahlavi (def 1).
  • multi-level marketing — Multi-level marketing is a marketing technique which involves people buying a product, then earning a commission by selling it to their friends. The abbreviation MLM is also used.
  • multi-ringed compound — A multi-ringed compound is a compound which has 70 or more carbon atoms, often a residual compound.
  • multichannel analyser — an electronic instrument, such as a pulse height analyser, that splits an input waveform into a large number of channels in accordance with a particular parameter of the input
  • 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.
  • multiplex transmitter — a transmitter that sends signals by multiplex
  • multiplication factor — the ratio of the number of neutrons in a generation to the number of neutrons in the previous generation: when the multiplication factor is equal to or greater than one, a chain reaction is possible
  • munchausen's syndrome — a mental disorder in which a patient feigns illness to obtain hospital treatment
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