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19-letter words containing a, p, r, i

  • mother-in-law plant — a West Indian foliage plant, Dieffenbachia seguine, of the arum family, having yellow-blotched leaves that cause temporary speechlessness when chewed.
  • mucopolysaccharides — Plural form of mucopolysaccharide.
  • multiple-entry visa — a visa that permits the holder to enter a country several times
  • multiplexor channel — (MPX) mainframe terminology for a slow peripheral device connection, e.g. for a printer, operator console, or card reader.
  • nail polish remover — solvent for removing nail polish
  • napierian logarithm — natural logarithm.
  • nasty piece of work — malicious person
  • neuropathologically — In a neuropathologic way.
  • neuropsychodynamics — The theoretical synthesis of neuroscience and psychodynamics.
  • nicolaus copernicus — Nicolaus [nik-uh-ley-uh s] /ˌnɪk əˈleɪ əs/ (Show IPA), (Mikolaj Kopernik) 1473–1543, Polish astronomer who promulgated the now accepted theory that the earth and the other planets move around the sun (the Copernican System)
  • nine plus two array — the arrangement of microtubules in a flagellum or cilium, consisting of a ring of nine evenly spaced couplets surrounding two central singlets. Symbol: 9 + 2.
  • nonproprietary drug — A nonproprietary drug is a generic drug that is essentially similar to a drug with a brand name.
  • nonrepresentational — not resembling or portraying any object in physical nature: a nonrepresentational painting.
  • norfolk island pine — a coniferous evergreen tree, Araucaria heterophylla (or A. excelsa), having whorled branches and needlelike foliage, widely cultivated as a houseplant.
  • north pacific ocean — the northern part of the Pacific Ocean, extending from the equator to the Arctic Ocean.
  • notre-dame-de-paris — Also called Notre Dame de Paris [French naw-truh dam duh pa-ree] /French nɔ trə dam də paˈri/ (Show IPA). a famous early gothic cathedral in Paris (started 1163).
  • occupation grouping — a category in a system of classifying people according to occupation, based originally on information obtained by government census and subsequently developed by market research. The classifications are used by the advertising industry to identify potential markets. The groups are A, B, C1, C2, D, and E
  • occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
  • old english pattern — a spoon pattern having a stem curving backward at the end.
  • one's pride and joy — Someone or something that is your pride and joy is very important to you and makes you feel very happy.
  • operational testing — (testing)   A US DoD term for testing performed by the end-user on software in its normal operating environment.
  • operations director — a director or senior manager who oversees the efficiency of business operations
  • operations research — the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.
  • optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
  • optical mark reader — (hardware)   (OMR) A special scanning device that can read carefully placed pencil marks on specially designed documents. OMR is frequenty used in forms, questionnaires, and answer-sheets.
  • oral interpretation — the study and practice of vocally expressing the meaning of written compositions, especially of literature.
  • orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
  • orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
  • over-interpretation — the act of interpreting; elucidation; explication: This writer's work demands interpretation.
  • overhead projection — the projection (using an overhead projector) of an enlarged image of a transparency onto a surface above and behind the person using it
  • paleoanthropologist — the study of the origins and predecessors of the present human species, using fossils and other remains.
  • palisade parenchyma — the upper layer of ground tissue in a leaf, consisting of elongated cells beneath and perpendicular to the upper epidermis and constituting the primary area of photosynthesis.
  • pancreatic fibrosis — cystic fibrosis.
  • parachute spinnaker — a very large spinnaker used on a racing yacht.
  • paradichlorobenzene — a white, crystalline, volatile, water-insoluble solid, C 6 H 4 Cl 2 , of the benzene series, having a penetrating odor: used chiefly as a moth repellent.
  • parainfluenza virus — any of a group of viruses that cause respiratory infections with influenza-like symptoms, esp in children
  • parallactic ellipse — the apparent ellipse, as seen against the background of more distant stars, described annually by a nearby star because of the earth's orbital motion around the sun. Compare parallax (def 2).
  • parallel processing — extending in the same direction, equidistant at all points, and never converging or diverging: parallel rows of trees.
  • parallel projection — a projection from one plane to a second plane in which the lines joining points on the first plane and corresponding images are parallel.
  • parametric equation — one of two or more equations expressing the location of a point on a curve or surface by determining each coordinate separately.
  • paraphase amplifier — an amplifier that produces a push-pull output from a single input.
  • parasympathomimetic — having an effect similar to that produced when the parasympathetic nervous system is stimulated
  • parathyroid extract — an aqueous preparation obtained from the parathyroid gland of cattle, used in medicine chiefly in cases of parathyroid deficiency and in veterinary medicine in the treatment of tetanic convulsions.
  • parathyroid hormone — a polypeptide hormone, produced in the parathyroid glands, that helps regulate the blood levels of calcium and phosphate. Abbreviation: PTH.
  • parkinson's disease — a common neurologic disease believed to be caused by deterioration of the brain cells that produce dopamine, occurring primarily after the age of 60, characterized by tremors, especially of the fingers and hands, muscle rigidity, shuffling gait, slow speech, and a masklike facial expression.
  • parliament building — structure housing legislative offices
  • parliamentary agent — (in Britain) a person who is employed to manage the parliamentary business of a private group
  • parthenogenetically — development of an egg without fertilization.
  • participatory sport — a sport in which people take part, (as opposed to a spectator sport)
  • particle dispersoid — A particle dispersoid is a suspension of solid particles in a gas.
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