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21-letter words containing r, e, c, l, a

  • large hadron collider — a particle accelerator at the European Laboratory for Particle Physics near Geneva, containing a circular underground tunnel 27km (16.8 miles) in circumference, around which two streams of hadrons are sent in opposite directions before being brought together in a high-energy collision
  • lateral magnification — the ratio of the height of the image to the height of the object in a lens or other optical system.
  • launch control center — any of a number of underground U.S. command facilities prepared to launch land-based missiles in event of war.
  • law of thermodynamics — any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics) and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics)
  • learning difficulties — difficulty experienced in reaching the average standard of people of the same age group as regards intellectual and cognitive skills and performance
  • leave sb in the lurch — If someone leaves you in the lurch, they go away or stop helping you at a very difficult time.
  • light armored vehicle — an eight-wheeled armored reconnaissance car with a 25mm cannon, in service with the U.S. Army and Marine Corps in the 1980s.
  • like a shag on a rock — abandoned and alone
  • macgillicuddy's reeks — a mountain range in County Kerry, SW Ireland. Highest peak (also highest in Ireland), Carrantuohill, 3414 feet (1041 meters).
  • madagascar periwinkle — a plant, Catharanthus roseus (or Vinca rosea), cultivated for its glossy foliage and pink or white flowers.
  • magnesium trisilicate — a white, fine, odorless and tasteless powder, Mg 2 O 8 Si 3 ⋅nH 2 O, used industrially to absorb odors and decolorize and pharmaceutically as an antacid.
  • magnetic permeability — permeability (def 2).
  • magneto-optical drive — magneto-optical disk
  • magnetocaloric effect — an increase or decrease of the temperature of a thermally isolated magnetic substance accompanying an increase or decrease in the intensity of a magnetic field.
  • magnificent riflebird — a bird of paradise, Craspedophora magnifica
  • main-topsail schooner — a two-masted or three-masted schooner having square topsails on the foremast and mainmast: a jackass brig or jackass bark.
  • marketable securities — Marketable securities are securities that can easily be sold quickly on the open market.
  • 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 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
  • megaspore mother cell — a diploid cell in plants that undergoes meiosis to create four haploid megaspores.
  • 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.
  • 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
  • monochloroacetic acid — chloroacetic acid.
  • mother-of-pearl cloud — nacreous cloud.
  • 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.
  • mucopolysaccharidoses — Plural form of mucopolysaccharidosis.
  • 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.
  • 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.
  • 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.
  • new general catalogue — NGC.
  • non-repeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • 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.
  • 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.
  • 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
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