13-letter words containing a, t, c, o
- antiochus iii — known as Antiochus the Great. 242–187 bc, king of Syria (223–187), who greatly extended the Seleucid empire but was forced (190) to surrender most of Asia Minor to the Romans
- antioncogenes — Plural form of antioncogene.
- antipolitical — opposed to politics or political principles
- antipsychotic — preventing or treating psychosis
- antirecession — acting against recession
- antirejection — acting to prevent the rejection of a transplanted organ
- antiresonance — a phenomenon in an electric, acoustic, or other such system in which the impedance is tending to infinity.
- antiscorbutic — preventing or curing scurvy
- antiselection — adverse selection.
- antisocialism — the quality of being antisocial
- antisocialist — a person opposed to socialism
- antisociality — the quality of being antisocial
- antispasmodic — preventing or arresting spasms, esp in smooth muscle
- antisudorific — an antiperspirant.
- apheliotropic — growing in a direction away from the sunlight
- apocalyptical — of or like an apocalypse; affording a revelation or prophecy.
- apocatastasis — the belief that all free creatures shall experience salvation
- apocryphalist — A member of the group who supported the inclusion of the Apocrypha in the Bible.
- apodictically — incontestable because of having been demonstrated or proved to be demonstrable.
- apoliticality — the quality of being apolitical
- apologeticism — An instance of the use of apologetics.
- apomictically — in an apomictic manner
- apophatically — In an apophatic way; using apophasis.
- apophlegmatic — having the ability to remove phlegm
- apoplectiform — of or resembling apoplexy or stroke.
- apostolic age — the earliest period of Christianity, lasting through the death of the last apostle.
- apostolic see — the see of the pope regarded as the successor to Saint Peter
- apostolically — In an apostolic way.
- appeals court — An appeals court is the same as an appellate court.
- apperceptions — Plural form of apperception.
- applicational — Of or pertaining to an application.
- appreciations — Plural form of appreciation.
- approach path — the course followed by an aircraft preparing for landing
- approach shot — a shot made to or towards the green after a tee shot
- arabicization — the gradual change of a culture into one that incorporates Arab culture and/or speaks Arabic
- arachnoiditis — an inflammation of the arachnoid membrane
- araeometrical — relating to araeometry
- arboriculture — the cultivation of trees or shrubs, esp for the production of timber
- arc cotangent — the angle, measured in radians, that has a cotangent equal to a given number. Symbol: cot −1. Abbreviation: arc cot.
- arc of lowitz — a halo or arc of light, occurring infrequently, which extends diagonally downward from a 22° parhelion.
- archaeobotany — the analysis and interpretation of plant remains found at archaeological sites
- archaeologist — a specialist in archaeology, the scientific study of prehistoric peoples and their cultures by analysis of their artifacts, inscriptions, monuments, etc.
- archaeometric — relating to archaeometry
- archaeopteryx — any of several extinct primitive birds constituting the genus Archaeopteryx, esp A. lithographica, which occurred in Jurassic times and had teeth, a long tail, well-developed wings, and a body covering of feathers
- archeologists — archaeology.
- archeptolemus — (in the Iliad) the son of Iphitus who served as a charioteer for Hector.
- architectonic — denoting, relating to, or having architectural qualities
- arctic willow — a low-growing shrub, Salix arctica, of the tundra
- arcticologist — a person who specializes in arcticology.
- aridification — the process by which a humid region becomes increasingly dry, as by climatic change or human interference with the ecology.