15-letter words containing a, c, o, i
- apostle pitcher — a stoneware pitcher decorated in relief with figures of the apostles.
- apostolic vicar — vicar apostolic.
- apostolicalness — The state or quality of being apostolical.
- apostrophically — (rhetoric) Using apostrophe; with sudden exclamatory dialogue.
- apple macintosh — Macintosh
- applesoft basic — (language) A version of BASIC for Apple computers.
- apprentice work — work done when young and a novice
- approach lights — lights on the runway that guide planes coming in to land
- approachability — capable of being approached; accessible.
- arc de triomphe — the triumphal arch in Paris begun by Napoleon I to commemorate his victories of 1805–6 and completed in 1836
- arch of triumph — Arc de Triomphe.
- archaeobotanist — A person engaged in archaeobotany.
- archeologically — In a archeological manner or fashion.
- archiepiscopacy — a form of church government in which power is vested in archbishops.
- archiepiscopate — the rank, office, or term of office of an archbishop
- architectonical — Alternative form of architectonic.
- armour-piercing — capable of penetrating armour plate
- arms inspection — the official checking of a country's weapons and other military equipment, usually to check that international agreements have been respected
- army air forces — a unit comprising almost all aviation, with its personnel, equipment, etc.: it became part of the Air Force on July 26, 1947.
- articles of war — the disciplinary and legal procedures by which the naval and military forces of Great Britain were bound before the 19th century
- ascending colon — the first portion of the colon, beginning at the cecum in the lower right abdominal cavity and continuing upward along the right posterior abdominal wall to approximately the lower ribs.
- asclepiadaceous — of, relating to, or belonging to the Asclepiadaceae, a family of mostly tropical and subtropical flowering plants, including the milkweed and swallowwort, having pollen in the form of a waxy mass (pollinium): now usually regarded as a subfamily of the Apocynaceae
- asiago (cheese) — a hard, dry, sharply flavored cheese originally of N Italy
- asiatic cholera — cholera (def 1).
- assign a policy — If you assign a policy, you transfer legal ownership of an insurance policy to another person.
- association law — any law governing the association of ideas
- astrodynamicist — a person who studies astrodynamics
- astronautically — In an astronautic way.
- astrophysically — from an astrophysical point of view
- astrophysicists — Plural form of astrophysicist.
- 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 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
- atlantic salmon — a valuable food and game fish, Salmo salar, mainly of northern coastal Atlantic waters or, when spawning, in freshwater streams tributary to the ocean.
- atmospherically — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atomic cocktail — an aqueous solution of radioactive substance administered orally as part of the treatment for cancer
- 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
- audubon society — a North American organization devoted to the conservancy of birds
- authentications — Plural form of authentication.
- autocannibalism — The eating of part of one's own body.
- autocollimation — the process used in an autocollimator.
- 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
- autodidacticism — any self-directed learning or self-education
- autoinoculation — the inoculation of microorganisms (esp viruses) from one part of the body into another, usually in the form of a vaccine
- automatic drive — an automotive transmission requiring either very little or no manual shifting of gears.