12-letter words containing a, t, c, o
- antimicrobic — Antimicrobial.
- antimnemonic — difficult to remember (often deliberately so)
- antimonarchy — Opposing a monarchy.
- antinarcotic — Opposing or countering narcotics.
- antinucleons — Plural form of antinucleon.
- antiochus iv — ?215–164 bc, Seleucid king of Syria (175–164), who attacked the Jews and provoked the revolt of the Maccabees
- antioncogene — (genetics) Any gene that suppresses the formation of tumours.
- antiperiodic — efficacious against recurring attacks of a disease
- antiphonical — Alternative form of antiphonic.
- antipoaching — acting against or opposed to poaching
- antipolitics — the rejection of party and electoral politics
- antiromantic — opposed to romanticism
- antisociable — Antisocial.
- antisocially — In an antisocial manner.
- antistrophic — Of or pertaining to an antistrophe.
- antiviolence — opposed to or acting against violence in society
- aortic valve — a semilunar valve between the aorta and the left ventricle of the heart that prevents the blood from flowing back into the left ventricle.
- aortographic — relating to an aortography or aortography
- aperiodicity — not periodic; irregular.
- aphoristical — Alternative form of aphoristic.
- apocalyptist — the writer of the Apocalypse or a related work
- apochromatic — (of a lens) almost free from spherical and chromatic aberration
- apodeictical — Apodeictic.
- apolitically — in an apolitical manner
- apostolicity — the quality of being apostolic
- apothecaries — Plural form of apothecary.
- apothegmatic — Relating to, or in the manner of, an apothegm; sententious; pithy.
- appeal court — An appeal court is the same as a Court of Appeal.
- appendectomy — the surgical removal of the vermiform appendix
- apperception — the attainment of full awareness of a sensation or idea
- applications — Plural form of application.
- appreciation — Appreciation of something is the recognition and enjoyment of its good qualities.
- appreciators — to be grateful or thankful for: They appreciated his thoughtfulness.
- appreciatory — appreciative.
- approachment — (archaic) approach.
- apricot tart — a pastry case filled with apricots
- arc cosecant — the angle, measured in radians, that has a cosecant equal to a given number. Symbol: csc −1. Abbreviation: arc csc;
- arch support — a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
- archaeometry — the use of science and modern technology in archaeology to examine and interpret archaeological remains
- archaization — Process of becoming or turning something more archaic.
- archegoniate — having archegonia
- archenterons — Plural form of archenteron.
- archeologist — archaeology.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- arctic ocean — the ocean surrounding the North Pole, north of the Arctic Circle. Area: about 14 100 000 sq km (5 440 000 sq miles)
- arctophilist — a collector of teddy bears
- aristocratic — Aristocratic means belonging to or typical of the aristocracy.
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- aristophanic — 448?–385? b.c, Athenian comic dramatist.