13-letter words containing a, c, e, t
- arctic circle — The Arctic Circle is an imaginary line drawn around the northern part of the world at approximately 66° North.
- aristocracies — Plural form of aristocracy.
- aristolochene — (organic compound) A bicyclic sesquiterpene produced by certain fungi.
- arithmetician — a person skilled in arithmetic
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- art collector — a person who collects works of art
- arthroscopies — Plural form of arthroscopy.
- artificialize — to render artificial
- aryepiglottic — pertaining to or connecting the arytenoid cartilage and the epiglottis.
- ascensiontide — the ten days from Ascension Day to the day before Whit Sunday
- ascertainable — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- ascertainably — In a way that can be ascertained.
- ascertainment — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- aschelminthes — a major grouping (formerly a phylum) of small-to-microscopic pseudocoelomate organisms, as the rotifers, nematodes, and gastrotriches, all of which are now classified as separate phyla.
- asset account — An asset account is an account that records the assets owned by a company.
- associateship — to connect or bring into relation, as thought, feeling, memory, etc.: Many people associate dark clouds with depression and gloom.
- associatively — in an associative or connective manner
- astroparticle — (astrophysics) A subatomic particle of cosmic origin.
- at attachment — Advanced Technology Attachment
- at face value — If you take something at face value, you accept it and believe it without thinking about it very much, even though it might be untrue.
- at one's back — behind, esp in support or pursuit
- at peace with — If you are at peace with yourself or at peace with the world, you feel calm and contented, and you have no emotional conflicts within yourself or with other people.
- atheistically — pertaining to or characteristic of atheists or atheism; containing, suggesting, or disseminating atheism: atheistic literature; atheistic people.
- athematically — in an athematic manner
- athletic shoe — a shoe designed to be worn for sports, exercising, or recreational activity, as racquetball, jogging, or aerobic dancing.
- atka mackerel — a commercially important ocean greenling (Pleurogrammus monopterygius) of the northern Pacific, esp. the area off the Aleutian Islands
- atlantic time — the civil time officially adopted for a country or region, usually the civil time of some specific meridian lying within the region. The standard time zones in the U.S. (Atlantic time, Eastern time, Central time, Mountain time, Pacific time, Yukon time, Alaska-Hawaii time, and Bering time) use the civil times of the 60th, 75th, 90th, 105th, 120th, 135th, 150th, and 165th meridians respectively, the difference of time between one zone and the next being exactly one hour.
- atmospherical — pertaining to, existing in, or consisting of the atmosphere: atmospheric vapors.
- atomic energy — nuclear energy
- atomic number — the number of protons in the nucleus of an atom of an element
- atomic theory — any theory in which matter is regarded as consisting of atoms, esp that proposed by John Dalton postulating that elements are composed of atoms that can combine in definite proportions to form compounds
- atomic volume — the atomic weight (relative atomic mass) of an element divided by its density
- atomic weapon — a weapon in which energy is provided by nuclear fission
- atomic weight — the weight of one atom of an element expressed in atomic mass units: it is the average weight of all the isotopes of the element
- atroceruleous — a deep blue-black color.
- atrociousness — The state of being atrocious.
- atypicalities — not typical; not conforming to the type; irregular; abnormal: atypical behavior; a flower atypical of the species.
- auction house — a commercial company that specializes in selling items at auction
- auctioneering — Present participle of auctioneer.
- audiocassette — a cassette containing audiotape
- auguste comte — (Isidore) Auguste (Marie François) [ee-zee-dawr oh-gyst ma-ree frahn-swa] /i ziˈdɔr oʊˈgüst maˈri frɑ̃ˈswa/ (Show IPA), 1798–1857, French founder of the philosophical system of positivism.
- authentically — not false or copied; genuine; real: an authentic antique.
- authenticated — Prove or show (something, esp. a claim or an artistic work) to be true or genuine.
- authenticates — Third-person singular simple present indicative form of authenticate.
- authenticator — a person or thing that authenticates.
- auto-destruct — self-destruct.
- auto-injector — An auto-injector is a hypodermic syringe that you can use to inject yourself with a liquid.
- autocatalyses — Third-person singular simple present indicative form of autocatalyse.
- autocephalous — (of an Eastern Christian Church) governed by its own national synods and appointing its own patriarchs or prelates
- autoeroticism — the arousal and use of one's own body as a sexual object, as through masturbation