9-letter words containing a, c, t, o
- antecourt — a forecourt.
- anteporch — an outer porch.
- anthocarp — a composite false fruit, consisting of the actual fruit and the perianth
- anthozoic — relating to anthozoans
- anthropic — of or relating to human beings
- anti-lock — designating or of an automotive braking system that prevents the wheels from locking during a sudden stop
- antichlor — a substance used to remove chlorine from a material after bleaching or to neutralize the chlorine present
- anticodon — a three-base unit of genetic code contained in transfer RNA that corresponds to a codon region on messenger RNA, involved in genetic translation
- anticosti — an island of E Canada, in the Gulf of St Lawrence; part of Quebec. Area: 7881 sq km (3043 sq miles)
- antiknock — a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine
- antimacho — opposed to macho attitudes
- antimonic — of or containing antimony in the pentavalent state
- antinomic — opposition between one law, principle, rule, etc., and another.
- antiochus — name of thirteen kings of the Seleucid dynasty of Syria
- antishock — designed to reduce the force of impact
- antitonic — (physiology) That reduces muscular or vascular tonus.
- antitoxic — of, containing, or acting as an antitoxin
- antonescu — Ion. 1882–1946, Romanian general and statesman; appointed prime minister (1940) by King Carol II. He was executed for war crimes
- antonymic — having the opposite meaning, relating to antonyms
- apocenter — the point in the orbit of a heavenly body farthest from a primary other than the earth or the sun.
- apocopate — to omit the final sound or sounds of (a word)
- apodictic — that can clearly be shown or proved; absolutely certain or necessarily true
- apomictic — produced by, or relating to, apomixis
- apophatic — of or relating to the belief that God can only be described by a process of negation
- apoptotic — of or relating to apoptosis
- apostolic — Apostolic means belonging or relating to a Christian religious leader, especially the Pope.
- apothecia — the fruit of certain lichens and fungi: usually an open, saucer-shaped or cup-shaped body, the inner surface of which is covered with a layer that bears asci.
- archabbot — In certain Catholic (notably Benedictine) congregations, the title of the general superior, ranking above all other abbots, vested in a particular abbey, which hence is called an archabbey (usually its motherhouse, such as Beuron, which gave its name to a Benedictine congregation).
- archivolt — a moulding around an arch, sometimes decorated
- archontic — relating to an archon
- archstone — a wedge-shaped stone forming the curved part of an arch
- arctogaea — a zoogeographical area comprising the Palaearctic, Nearctic, Oriental, and Ethiopian regions
- arcuation — the use of arches or vaults in buildings
- aromantic — Not given to experiencing romantic attraction to others.
- aromatics — Plural form of aromatic.
- artichoke — Artichokes or globe artichokes are round green vegetables that have fleshy leaves arranged like the petals of a flower.
- ascorbate — a salt of ascorbic acid
- associate — If you associate someone or something with another thing, the two are connected in your mind.
- astichous — having a structure or layout that is not in rows
- astrocyte — any of the star-shaped cells in the tissue supporting the brain and spinal cord (neuroglia)
- astucious — Subtle; cunning; astute.
- asystolic — Pertaining to asystole.
- at anchor — If a boat is at anchor, it is floating in a particular place and is prevented from moving by its anchor.
- at source — at the point of origin
- athetosic — relating to or characterized by athetosis
- athrocyte — a cell that is able to receive and store matter
- atomicity — the state of being made up of atoms
- atomistic — of atoms or atomism
- atonicity — lack of tone; atony.
- atrocious — If you describe something as atrocious, you are emphasizing that its quality is very bad.