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18-letter words containing a, t, o, m, r, n

  • philharmonic pitch — a standard of pitch in which A above middle C is established at 440 vibrations per second.
  • photoisomerization — isomerization induced by light.
  • plane trigonometry — the branch of trigonometry dealing with plane triangles.
  • pneumatic conveyor — a tube through which powdered or granular material, such as cement, grain, etc is transported by a flow of air
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • portable equipment — Portable equipment is electrical equipment that can easily be moved from one place to another while in operation or while connected to the supply.
  • postmaster general — the executive head of the postal system of a country.
  • postmillenarianism — postmillennialism.
  • postviral syndrome — debilitating condition occurring as a sequel to viral illness
  • potassium myronate — sinigrin.
  • pragmatic sanction — any one of various imperial decrees with the effect of fundamental law.
  • presumption of law — a presumption based upon a policy of law or a general rule and not upon the facts or evidence in an individual case.
  • primate of england — a title of the archbishop of Canterbury.
  • processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
  • production company — an organization which produces, films, plays, television or radio programmes
  • production manager — a supervisor of the budget, crew and other details in the production of a film or play
  • project management — leadership of a task or programme
  • projection machine — an apparatus that projects motion pictures; projector.
  • promotion campaign — a campaign designed to encourage the sale of (a product) by advertising or securing financial support
  • proportional limit — elastic limit.
  • provision merchant — a person or company in the business of retailing food and other provisions
  • psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
  • pulmonic airstream — a current of lung air set in motion by the respiratory muscles in the production of speech.
  • quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
  • radiocommunication — communication by means of radio waves
  • radiometric dating — any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
  • raman spectroscopy — a form of spectroscopy which uses the Raman effect for studying molecules
  • random walk theory — the theory that the future movement of share prices does not reflect past movements and therefore will not follow a discernible pattern
  • rapid eye movement — rapidly shifting, continuous movements of the eyes beneath closed lids during the stage of sleep characterized by dreaming.
  • reach for the moon — to desire or attempt something unattainable or difficult to obtain
  • reaction formation — a behavioral tendency developed in direct opposition to a repressed impulse.
  • reactive component — the component in an alternating-current circuit that does not contribute power because it is 90° out of phase with the voltage or current.
  • recess appointment — a person appointed to an office by the President of the United States without approval from the Senate because the Senate is in recess
  • reciprocating pump — A reciprocating pump is a pump which uses a backward and forward movement to move a fluid.
  • redevelopment area — an urban area in which all or most of the buildings are demolished and rebuilt
  • registered company — a company which has officially registered its business
  • relative minor key — a minor key that has the same key signature as a major key, but a different tonic
  • remains to be seen — If you say that it remains to be seen whether something will happen, you mean that nobody knows whether it will happen.
  • repayment mortgage — a mortgage that you pay back in monthly repayments which consist of the accrued interest in addition to the original amount borrowed
  • repeat performance — sth done again
  • restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
  • resuscitation room — an intensive care unit
  • retrograde amnesia — a memory disorder characterized by an inability to remember events or experiences that occurred before a significant point in time.
  • reverberation time — the time it takes for a sound made in a room to diminish by 60 decibels.
  • rhyming dictionary — a specialist dictionary organized by the final sounds of words, used to write poetry
  • roman architecture — buildings in style of ancient Rome
  • roman congregation — any of the executive departments of the Curia Romana as the administration of the Roman Catholic Church.
  • room occupancy tax — Room occupancy tax is a tax that guests at a hotel have to pay in order to stay there.
  • rotational molding — a method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold.
  • rule of engagement — a directive issued by a military authority controlling the use and degree of force, especially specifying circumstances and limitations for engaging in combat.
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