0%

16-letter words containing r, e, c

  • level descriptor — one of a set of criteria used to assess the performance of a pupil in a particular subject
  • lever escapement — an escapement in which a pivoted lever, made to oscillate by the escape wheel, engages a balance staff and causes it to oscillate.
  • lexical analyser — (language)   (Or "scanner") The initial input stage of a language processor (e.g. a compiler), the part that performs lexical analysis.
  • liberal democrat — In Britain, a Liberal Democrat is a member of the Liberal Democrat Party.
  • library pictures — a caption used to alert viewers that footage being broadcast is from an earlier time and is not happening now
  • lick observatory — the astronomical observatory of the University of California, situated on Mount Hamilton, near San Jose, California, and having a 120-inch (3-meter) reflecting telescope and a 36-inch (91-cm) refracting telescope.
  • liebig condenser — a laboratory condenser consisting of a glass tube surrounded by a glass envelope through which cooling water flows
  • light microscope — microscope (def 1).
  • limited monarchy — a monarchy that is limited by laws and a constitution.
  • limited-monarchy — a limited train, bus, etc.
  • lincoln reckoner — An interactive mathematics program including matrix operations, written about 1965. It ran on the TX-2.
  • literacy project — a project, plan or scheme to increase literacy in a country, area, etc
  • literalistically — adherence to the exact letter or the literal sense, as in translation or interpretation: to interpret the law with uncompromising literalism.
  • lithium chloride — a white, water-soluble, deliquescent, crystalline solid, LiCl, used chiefly in the manufacture of mineral water, especially lithia water, and as a flux in metallurgy.
  • local government — the administration of the civic affairs of a city, town, or district by its inhabitants rather than by the state or country at large.
  • logical operator — any of the Boolean symbols or functions, as AND, OR, and NOT, denoting a Boolean operation; Boolean operator.
  • logical relation — A relation R satisfying f R g <=> For all a, b, a R b => f a R g b This definition, by Plotkin, can be used to extend the definition of a relation on the types of a and b to a relation on functions.
  • longicorn beetle — any beetle of the family Cerambycidae, having a long narrow body, long legs, and long antennae
  • lord chamberlain — (in Britain) the chief official of the royal household
  • lorenz attractor — (mathematics)   (After Edward Lorenz, its discoverer) A region in the phase space of the solution to certain systems of (non-linear) differential equations. Under certain conditions, the motion of a particle described by such as system will neither converge to a steady state nor diverge to infinity, but will stay in a bounded but chaotically defined region. By chaotic, we mean that the particle's location, while definitely in the attractor, might as well be randomly placed there. That is, the particle appears to move randomly, and yet obeys a deeper order, since is never leaves the attractor. Lorenz modelled the location of a particle moving subject to atmospheric forces and obtained a certain system of ordinary differential equations. When he solved the system numerically, he found that his particle moved wildly and apparently randomly. After a while, though, he found that while the momentary behaviour of the particle was chaotic, the general pattern of an attractor appeared. In his case, the pattern was the butterfly shaped attractor now known as the Lorenz attractor.
  • lost-wax process — a process of investment casting in which a refractory mold is built up around a pattern of wax and then baked so as to melt and drain off the wax.
  • louisiana french — French as spoken in Louisiana; Cajun. Abbreviation: LaF.
  • lourenco marques — former name of Maputo.
  • low-carbon steel — steel containing between 0.04 and 0.25 per cent carbon
  • lower california — Baja California.
  • luck of the draw — the force that seems to operate for good or ill in a person's life, as in shaping circumstances, events, or opportunities: With my luck I'll probably get pneumonia.
  • lumberjack shirt — a thick checked shirt, as worn by lumberjacks
  • luncheon voucher — a voucher worth a specified amount issued to employees and redeemable at a restaurant for food
  • lz77 compression — The first algorithm to use the Lempel-Ziv substitutional compression schemes, proposed in 1977. LZ77 compression keeps track of the last n bytes of data seen, and when a phrase is encountered that has already been seen, it outputs a pair of values corresponding to the position of the phrase in the previously-seen buffer of data, and the length of the phrase. In effect the compressor moves a fixed-size "window" over the data (generally referred to as a "sliding window"), with the position part of the (position, length) pair referring to the position of the phrase within the window. The most commonly used algorithms are derived from the LZSS scheme described by James Storer and Thomas Szymanski in 1982. In this the compressor maintains a window of size N bytes and a "lookahead buffer", the contents of which it tries to find a match for in the window: while (lookAheadBuffer not empty) { get a pointer (position, match) to the longest match in the window for the lookahead buffer; if (length > MINIMUM_MATCH_LENGTH) { output a (position, length) pair; shift the window length characters along; } else { output the first character in the lookahead buffer; shift the window 1 character along; } } Decompression is simple and fast: whenever a (POSITION, LENGTH) pair is encountered, go to that POSITION in the window and copy LENGTH bytes to the output. Sliding-window-based schemes can be simplified by numbering the input text characters mod N, in effect creating a circular buffer. The sliding window approach automatically creates the LRU effect which must be done explicitly in LZ78 schemes. Variants of this method apply additional compression to the output of the LZSS compressor, which include a simple variable-length code (LZB), dynamic Huffman coding (LZH), and Shannon-Fano coding (ZIP 1.x), all of which result in a certain degree of improvement over the basic scheme, especially when the data are rather random and the LZSS compressor has little effect. An algorithm was developed which combines the ideas behind LZ77 and LZ78 to produce a hybrid called LZFG. LZFG uses the standard sliding window, but stores the data in a modified trie data structure and produces as output the position of the text in the trie. Since LZFG only inserts complete *phrases* into the dictionary, it should run faster than other LZ77-based compressors. All popular archivers (arj, lha, zip, zoo) are variations on LZ77.
  • lz78 compression — A substitutional compression scheme which works by entering phrases into a dictionary and then, when a reoccurrence of that particular phrase is found, outputting the dictionary index instead of the phrase. Several algorithms are based on this principle, differing mainly in the manner in which they manage the dictionary. The most well-known Lempel-Ziv scheme is Terry Welch's Lempel-Ziv Welch variant of LZ78.
  • mach's principle — the proposition that there is no absolute space and that the inertia and acceleration of a body are determined by all of the matter of the universe.
  • machine learning — The ability of a machine to improve its performance based on previous results.
  • machine operator — someone who operates mechanical equipment
  • machine readable — of or relating to data encoded on an appropriate medium and in a form suitable for processing by computer.
  • machine-readable — of or relating to data encoded on an appropriate medium and in a form suitable for processing by computer.
  • maclaurin series — a Taylor series in which the reference point is zero.
  • macpherson strut — an automobile suspension-system component that consists of a strut combined with a spring and shock absorber and connects the wheel to the frame of the vehicle.
  • macroenvironment — (biology) The large-scale and long-term environment and conditions that affect an organism.
  • macrolepidoptera — a collector's name for that part of the lepidoptera that comprises the butterflies and the larger moths (noctuids, geometrids, bombycids, springtails, etc): a term without taxonomic significance
  • macrometeorology — the study of large-scale atmospheric phenomena, as the general circulation of the air or global weather conditions.
  • macrorestriction — In physical gene mapping, the digestion of DNA of high molecular weight with a restriction enzyme having a low number of restriction sites.
  • magnesiochromite — (mineral) A chromite species with the formula MgCr2O4.
  • magnetic bearing — the bearing of a point relative to that of the nearest magnetic pole.
  • magnetic circuit — the closed path described by magnetic flux. It is analogous to the electric circuit with resistance, where flux, reluctance, and magnetomotive force correspond to electric current, resistance, and electromotive force.
  • magnetic equator — aclinic line.
  • magnetic pyrites — Mineralogy. pyrrhotite.
  • magneto-electric — of or relating to the induction of electric current or electromotive force by means of permanent magnets.
  • magnetochemistry — the study of magnetic and chemical phenomena in their relation to one another.
  • magnetoreceptors — Plural form of magnetoreceptor.
  • magnetostriction — a change in dimensions exhibited by ferromagnetic materials when subjected to a magnetic field.
Was this page helpful?
Yes No
Thank you for your feedback! Tell your friends about this page
Tell us why?