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15-letter words containing o, r, a, i

  • at your service — You can use 'at your service' after your name as a formal way of introducing yourself to someone and saying that you are willing to help them in any way you can.
  • atherosclerosis — a degenerative disease of the arteries characterized by patchy thickening of the inner lining of the arterial walls, caused by deposits of fatty material; a form of arteriosclerosis
  • atherosclerotic — Of, pertaining to, or afflicted with atherosclerosis.
  • athletic sports — sports, esp track and field events, in which athleticism is required
  • atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
  • atrabiliousness — The state or quality of being characterized by melancholy or glumness.
  • audio frequency — a frequency in the range 20 hertz to 20 000 hertz. A sound wave of this frequency would be audible to the human ear
  • audio recording — an electronic recording of sound
  • auditor general — (in Canada) a federal official responsible for auditing government departments and making an annual report
  • aurora borealis — the aurora seen around the North Pole
  • authoritatively — having due authority; having the sanction or weight of authority: an authoritative opinion.
  • autobiographers — Plural form of autobiographer.
  • autobiographies — Plural form of autobiography.
  • autocorrelation — the condition occurring when successive items in a series are correlated so that their covariance is not zero and they are not independent
  • autocorrelative — Relating to autocorrelation.
  • autodestructive — likely to cause one's own destruction
  • autolithography — a lithographic technique by which the artist draws or traces with a brush and pen directly on a stone or plate.
  • automatic drive — an automotive transmission requiring either very little or no manual shifting of gears.
  • automatic rifle — a type of light machine gun capable of firing automatically or in single shots.
  • automorphically — in an automorphic manner
  • autoradiographs — Plural form of autoradiograph.
  • autoradiography — the technique or process of making autoradiographs.
  • autorhythmicity — The quality of being autorhythmic, or generating its own rhythm, as for example the cells of the cardiac muscle do.
  • autotetraploidy — the generation of the tetraploid state, created by the fusing of two nuclei from the same species
  • autotransfusion — a process in which a patient receives some of his or her own blood in a transfusion rather than a donor's blood
  • autotrophically — through an autotrophic process
  • auxiliary rotor — the tail rotor of a helicopter, used for directional and rotary control
  • aviator glasses — sunglasses that look like goggles
  • away-going crop — a crop planted by a tenant that matures after the expiration of the tenancy and is rightfully the tenant's to harvest.
  • azobisformamide — (chemistry) azodicarbonamide.
  • back projection — a method of projecting pictures onto a translucent screen so that they are viewed from the opposite side, used esp in films to create the illusion that the actors in the foreground are moving
  • backup rotation — (operating system)   Any system for re-using backup media, e.g. magnetic tape. One extreme would be to use the same media for every backup (e.g. copy disk A to disk B), the other extreme would be to use new media every time. The trade-off is between the cost of buying and storing media and the ability to restore any version of any file. One example is the Grandfather, Father, Son (GFS) scheme.
  • baconian theory — the theory attributing the authorship of Shakespeare's plays to Francis Bacon.
  • bacterial ghost — a bacterial cell that is emptied and filled artificially with another substance
  • bacteriological — Of or relating to bacteriology or bacteria.
  • bacteriophagous — Pertaining to the predation and consumption of bacterium.
  • badminton court — the court on which games of badminton are played
  • baja california — peninsula in Mexico, between the Pacific & the Gulf of California: divided into a northern state (Baja California), 27,071 sq mi (70,114 sq km), pop. 1,661,000, cap. Mexicali; and a southern state (Baja California Sur), 28,447 sq mi (73,677 sq km), pop. 318,000, cap. La Paz
  • bandstop filter — A bandstop filter is a filter designed to eliminate all frequencies within a band of frequencies.
  • banking product — one of the various services offered by a bank to its customers: mortgages, loans, insurance etc
  • baptism of fire — If someone who has just begun a new job has a baptism of fire, they immediately have to cope with very many severe difficulties and obstacles.
  • bar examination — a written examination to determine if one is qualified to practice law in a particular jurisdiction.
  • barbizon school — a group of French painters of landscapes of the 1840s, including Théodore Rousseau, Daubigny, Diaz, Corot, and Millet
  • barcelona chair — an armless, padded leather chair on a steel frame shaped like a curved X: Barcelona is a trademark for this chair
  • bargain counter — a store counter on which goods are displayed for sale at reduced prices
  • barium chloride — a poisonous compound, BaCl2, consisting of flat white crystals that are soluble in water: it is used to treat water, metals, leather, etc.
  • barium chromate — a yellow, crystalline compound, BaCrO 4 , used as a pigment (barium yellow)
  • barium peroxide — a gray-white powder, BaO2, used as a bleach and in making hydrogen peroxide
  • barn conversion — the adaptation of a farm barn into a building serving a different use, such as a house or commercial premises
  • barry mountains — a mountain range in SE Australia, in E Victoria: part of the Australian Alps
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