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15-letter words containing a, r, o

  • assemblypersons — Plural form of assemblyperson.
  • astrobiologists — Plural form of astrobiologist.
  • astrodynamicist — a person who studies astrodynamics
  • astronautically — In an astronautic way.
  • astronavigation — celestial navigation
  • astrophotograph — a photograph of the heavenly bodies
  • astrophotometry — the measurement of the intensity of light of celestial objects.
  • astrophysically — from an astrophysical point of view
  • astrophysicists — Plural form of astrophysicist.
  • at death's door — If you say that someone is at death's door, you mean they are very ill indeed and likely to die.
  • at short notice — Notice is used in expressions such as 'at short notice', 'at a moment's notice' or 'at twenty-four hours' notice', to indicate that something can or must be done within a short period of time.
  • at the controls — If someone is at the controls of a machine or other piece of equipment, they are operating it.
  • at the mercy of — in the power of
  • 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.
  • attorney-at-law — a lawyer qualified to represent in court a party to a legal action
  • 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
  • augmented roman — a writing system based on an expanded English alphabet, consisting of 43 characters representing different phonemes of spoken English, used for teaching beginners to read. Abbreviation: I.T.A., i.t.a.
  • augusta gregoryLady Augusta (Isabella Augusta Persse) 1852–1932, Irish dramatist.
  • 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
  • autofluorescent — Of, pertaining to, or exhibiting autofluorescence.
  • autolithography — a lithographic technique by which the artist draws or traces with a brush and pen directly on a stone or plate.
  • automata theory — the formal study of the power of computation of abstract machines
  • 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.
  • autostereoscopy — The display of stereoscopic images without the use of special viewing equipment.
  • autotetraploidy — the generation of the tetraploid state, created by the fusing of two nuclei from the same species
  • autotransformer — a transformer in which part of the winding is common to both primary and secondary circuits
  • autotransfusion — a process in which a patient receives some of his or her own blood in a transfusion rather than a donor's blood
  • autotransplants — Plural form of autotransplant.
  • 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.
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