15-letter words containing o, r, s, i
- anfractuosities — Plural form of anfractuosity.
- angina pectoris — a sudden intense pain in the chest, often accompanied by feelings of suffocation, caused by momentary lack of adequate blood supply to the heart muscle
- angustirostrate — having a narrow, beak-like part
- anisotropically — Physics. of unequal physical properties along different axes. Compare isotropic (def 1).
- annapolis royal — a town in SE Canada in W Nova Scotia on an arm of the Bay of Fundy: the first settlement in Canada (1605). Pop: 550 (2001)
- anne of austria — 1601–66, wife of Louis XIII of France and daughter of Philip III of Spain: regent of France (1643–61) for her son Louis XIV
- anteroposterior — Relating to or directed toward both front and back.
- anthropogenesis — the study of the origins of man
- anthropologists — Plural form of anthropologist.
- anthropometrics — the science of measuring the size and proportions of the human body (called anthropometry), especially as applied to the design of furniture and machines.
- anthropopathism — ascription of human passions or feelings to a being or beings not human, especially to a deity.
- anthropopsychic — the attribution of consciousness to divine beings and nature
- anthroposophist — A proponent of anthroposophy.
- anti-censorship — the act or practice of censoring.
- anti-conformist — a person who conforms, especially unquestioningly, to the usual practices or standards of a group, society, etc.
- anti-historical — of, pertaining to, treating, or characteristic of history or past events: historical records; historical research.
- antiabortionist — An antiabortionist is someone who wants to limit or prevent the legal availability of abortions.
- antiaphrodisiac — something that represses sexual desire
- antiaristocracy — Opposed to the aristocracy.
- anticarcinogens — Plural form of anticarcinogen.
- anticholesterol — an agent which acts against cholesterol, either as an antibody produced naturally by many mammals or in the form of a drug
- antiforeclosure — opposed to the process of foreclosure
- antilock brakes — brakes fitted to some road vehicles that prevent skidding and improve control by sensing and compensating for overbraking
- antiprogressive — opposed to or acting against progression in society
- antirationalism — the opposition to rationalism
- antirationalist — opposed to rationalism
- antiremonstrant — the party that opposed the Remonstrants
- antiretrovirals — Plural form of antiretroviral.
- antiromanticism — the opposition to romanticism
- antisegregation — opposed to or acting against segregration
- antituberculous — (medicine) Acting to combat or counteract tuberculosis.
- aortic stenosis — abnormal narrowing of the aorta, especially of its orifice, usually as a result of rheumatic fever or embryologic anomalies.
- apolipoproteins — Plural form of apolipoprotein.
- apollo asteroid — one of a number of asteroids whose orbits cross that of the earth.
- apostle pitcher — a stoneware pitcher decorated in relief with figures of the apostles.
- apostolic vicar — vicar apostolic.
- apostrophically — (rhetoric) Using apostrophe; with sudden exclamatory dialogue.
- approach lights — lights on the runway that guide planes coming in to land
- appropriateness — suitable or fitting for a particular purpose, person, occasion, etc.: an appropriate example; an appropriate dress.
- approximateness — The quality of being approximate.
- archaeobotanist — A person engaged in archaeobotany.
- archiepiscopacy — a form of church government in which power is vested in archbishops.
- archiepiscopate — the rank, office, or term of office of an archbishop
- ariboflavinosis — a condition resulting from a dietary deficiency of riboflavin
- aristotelianism — a philosophical tradition based on the wide-ranging belief system of Aristotle
- 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.
- arrivals lounge — a waiting area for people meeting passengers
- arrondissements — Plural form of arrondissement.
- articles of war — the disciplinary and legal procedures by which the naval and military forces of Great Britain were bound before the 19th century