13-letter words containing a, c, o, i
- alluvial cone — a steep, narrow, cone-shaped alluvial fan formed where a swift stream suddenly slows down, as where an upland stream emerges abruptly into a level plain
- alpha scorpii — Antares
- alpine chough — a bird of the crow family, Pyrrocorax graculus, found in the highest mountain regions of S Europe and central Asia, with a yellow bill, black plumage, and red legs
- alsike clover — a European clover, Trifolium hybridum, having pink flowers, grown in the U.S. for forage.
- alumosilicate — (inorganic chemistry) The anion [AlSiO4]-1.
- american aloe — century plant
- american bond — a brickwork bond having a course of headers between five or six courses of stretchers.
- american fork — a town in central Utah.
- amino radical — the univalent group, −NH 2 .
- aminoaciduria — the presence of amino acids in urine
- ammonia clock — an atomic clock based on the frequency of inversion of the ammonia molecule
- amniocenteses — Plural form of amniocentesis.
- amniocentesis — If a pregnant woman has an amniocentesis, fluid is removed from her womb in order to check that her unborn baby is not affected by certain genetic disorders.
- amphictyonies — Plural form of amphictyony.
- amphitrichous — having a single flagellum at each end.
- amphotericins — Plural form of amphotericin.
- amplification — the act or result of amplifying
- amplificatory — of the nature of enlargement or extension, as of a statement, narrative, etc.
- anachronistic — You say that something is anachronistic when you think that it is out of date or old-fashioned.
- anaerobically — (of an organism or tissue) living in the absence of air or free oxygen.
- anaphorically — referring back to or substituting for a preceding word or group of words: anaphoric reference.
- anaphrodisiac — tending to lessen sexual desire
- anaphylactoid — Of, pertaining to, or resembling anaphylaxis.
- androcentrism — centered on, emphasizing, or dominated by males or masculine interests: an androcentric society; an androcentric religion.
- androdioecism — the state of being androdioecious
- anecdotically — in an anecdotical manner
- anesthetic to — incapable of feeling or responding to
- anfractuosity — the condition or quality of being anfractuous
- angiosarcomas — Plural form of angiosarcoma.
- anglicisation — The process by which something or someone (usually a word) is made more English. Usually applied to language or culture.
- anglicization — (US) alternative spelling of anglicisation.
- anharmonicity — (mechanics) Of or pertaining to the deviation of a system from harmonicity (being a harmonic oscillator).
- anise camphor — anethole.
- anisometropic — relating to anisometropia
- anno hebraico — A.H.
- annunciations — Plural form of annunciation.
- anomalistical — relating to a planet's angular distance from its last perihelion or orbital point nearest to the sun
- anthropogenic — relating to anthropogenesis
- anthropologic — the science that deals with the origins, physical and cultural development, biological characteristics, and social customs and beliefs of humankind.
- anti-catholic — opposed to the beliefs, practices, and adherents of the Roman Catholic Church
- anti-colonial — opposing colonialism.
- anti-dogmatic — relating to or of the nature of a dogma or dogmas or any strong set of principles concerning faith, morals, etc., as those laid down by a church; doctrinal: We hear dogmatic arguments from both sides of the political spectrum.
- anti-hypnotic — of or relating to hypnosis or hypnotism.
- anti-monarchy — a state or nation in which the supreme power is actually or nominally lodged in a monarch. Compare absolute monarchy, limited monarchy.
- anti-narcotic — any of a class of substances that blunt the senses, as opium, morphine, belladonna, and alcohol, that in large quantities produce euphoria, stupor, or coma, that when used constantly can cause habituation or addiction, and that are used in medicine to relieve pain, cause sedation, and induce sleep.
- anti-politics — the science or art of political government.
- anti-romantic — of, relating to, or of the nature of romance; characteristic or suggestive of the world of romance: a romantic adventure.
- antiapoptotic — (biology) Acting to prevent apoptosis.
- anticipations — Plural form of anticipation.
- anticlinorium — a vast elongated anticline with its strata further folded into anticlines and synclines