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18-letter words containing r, o, s, a, l

  • natural philosophy — natural science.
  • nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
  • neovascularization — the development of new blood vessels, especially in tissues where circulation has been impaired by trauma or disease.
  • neuroleptanalgesia — a semiconscious nonreactive state induced by certain drug combinations, as fentanyl with droperidol.
  • neurophysiological — the branch of physiology dealing with the functions of the nervous system.
  • neuropsychological — Of or pertaining to neuropsychology, the relation or combination of brain and mind.
  • new orleans lugger — a half-decked fishing boat, formerly used on the Gulf of Mexico near New Orleans, having a rather broad hull with centerboard and a single mast with a large dipping lugsail.
  • no-fault insurance — Also called no-fault insurance. a form of automobile insurance designed to enable the policyholder in case of an accident to collect a certain basic compensation promptly for economic loss from his or her own insurance company without determination of liability.
  • nocturnal emission — the release of semen during sleep, often during a sexual dream.
  • non-circumstantial — of pertaining to, or derived from circumstances: a circumstantial result.
  • non-conversational — able or ready to converse; given to conversation.
  • non-understandable — capable of being understood; comprehensible.
  • nonpartisan league — a political organization of farmers, founded in North Dakota in 1915, and extending to many states west of the Mississippi, with the aim of influencing agricultural legislation in state legislatures.
  • nonpreferentialism — of, relating to, or of the nature of preference: preferential policies.
  • nonstriated muscle — smooth muscle
  • nord-pas-de-calais — a region of N France, on the Straits of Dover (the Pas de Calais): coal-mining, textile, and metallurgical industries
  • normally aspirated — A normally aspirated or naturally aspirated engine breathes air at atmospheric pressure.
  • northern transvaal — province of South Africa, in the N part: 47,599 sq mi (123,280 sq km); pop. 5,202,000; cap. Pietersburg
  • nueva san salvador — Santa Tecla.
  • offensive material — any published or broadcast content (such as articles, photographs, films, or websites) that is likely to be upsetting, insulting, or objectionable to some or most people
  • official solicitor — an officer of the Supreme Court of Judicature with special responsibilities for protecting the interests of persons under disability
  • offset lithography — offset (def 6).
  • on the danger list — critically ill in hospital
  • one's heart bleeds — used to express sympathetic grief, but often used ironically
  • operationalisation — Alternative spelling of operationalization.
  • optical disc drive — optical disk drive
  • optical disk drive — (hardware)   (Or "optical disc drive", "optical storage") A generic term for any device that reads and/or writes optical media, i.e. compact discs, DVDs and/or Blu-ray discs or future media that uses light (from a small laser) to read data off a removable, rotating disk. At least one such drive is commonly installed in most personal computers to allow them to play and/or record audio and video media and load and store data such as program installers. The floppy disk has been replaced by optical media due to its vastly greater capacity, e.g. 50,000 megabytes for a dual-layer blu-ray disc compared with 1.5 megabytes for a floppy (over 30,000 times as much).
  • optical microscope — traditional magnifying instrument
  • optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
  • order of australia — an order awarded to Australians for outstanding achievement or for service to Australia or to humanity at large; established in 1975
  • organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
  • oriental alabaster — alabaster (def 2).
  • oriental cat's-eye — a chatoyant variety of chrysoberyl, used as a gem.
  • oriental scops owl — any of a group of small owls having ear tufts and a whistling call, especially Otus scops (Old World scops owl) and O. sunia (Oriental scops owl)
  • oriental shorthair — any of a breed of domestic cat, similar to the Siamese but with greenish eyes and often a coat of a solid color
  • oscillographically — By means of oscillography.
  • overspecialization — excessive specialization, as in a field of study.
  • owen stanley range — a mountain range in SE New Guinea. Highest peak: Mount Victoria, 4073 m (13 363 ft)
  • pacinian corpuscle — (sometimes lowercase) a microscopic, onionlike body consisting of layers of connective tissue wrapped around a nerve ending, located in the deep layers of skin, tendons, etc., and functioning as a sensory receptor of pressure and vibration.
  • pair of spectacles — a score of 0 in each innings of a match
  • parallel processor — (parallel)   A computer with more than one central processing unit, used for parallel processing.
  • parallel resonance — the resonance that results when circuit elements are connected with their inductance and capacitance in parallel, so that the impedance of the combination rises to a maximum at the resonant frequency
  • parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
  • passive vocabulary — all the words, collectively, that a person can understand
  • pectoral sandpiper — an American sandpiper, Calidris melanotos, the male of which, when courting, inflates its chest conspicuously.
  • pellitory of spain — a small Mediterranean plant, Anacyclus pyrethrum, the root of which contains an oil formerly used to relieve toothache: family Asteraceae (composites)
  • people's democracy — (in Communist ideology) a country or form of government in transition from bourgeois democracy to socialism. In this stage there is more than one class, the largest being the proletariat, led by the Communist Party, which is therefore the dominant power
  • percussion flaking — a method of forming a flint tool by striking flakes from a stone core with another stone or a piece of bone or wood.
  • personal allowance — the amount of money you are allowed to earn each year without paying tax
  • personal assistant — aide
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