13-letter words containing a, d, i, t
- antipesticide — opposed to the use of pesticides
- antiradiation — Countering radiation.
- antispasmodic — preventing or arresting spasms, esp in smooth muscle
- antisudorific — an antiperspirant.
- apodictically — incontestable because of having been demonstrated or proved to be demonstrable.
- apostrophized — Simple past tense and past participle of apostrophize.
- apparent wind — (wind), the velocity of air as measured from a moving object, as a ship.
- appendiculate — having appendicles
- aptitude test — An aptitude test is a test that is specially designed to find out how easily and how well you can do something.
- aptitudinally — in a manner that indicates aptitude
- arachnoiditis — an inflammation of the arachnoid membrane
- archimandrite — the head of a monastery or a group of monasteries
- architectured — Designed (according to a form of architecture, or as if by an architect).
- aridification — the process by which a humid region becomes increasingly dry, as by climatic change or human interference with the ecology.
- aridity index — a number indicating how much more precipitation could be lost by evapotranspiration if it were available than is actually lost at a given location.
- armistice day — the anniversary of the signing of the armistice that ended World War I, on Nov 11, 1918, now kept on Remembrance Sunday
- armstand dive — a dive starting from a handstand at the end of a springboard or a platform with the diver's back to the water.
- arseniuretted — combined with arsenic so as to form an arsenide.
- arthroconidia — Plural form of arthroconidium.
- ascensiontide — the ten days from Ascension Day to the day before Whit Sunday
- aspartic acid — nonessential amino acid that is a component of proteins and acts as a neurotransmitter
- asteroid belt — the concentrations of asteroids that move around the sun mainly between the orbits of Mars and Jupiter
- astrodynamics — the study of the motion of natural and artificial bodies in space
- at a discount — below the regular price
- at first hand — If you learn or experience something at first hand, you experience it yourself or learn it directly rather than being told about it by other people.
- at the fiddle — engaged in an illegal or fraudulent undertaking
- aten asteroid — one of a small group of asteroids whose orbits cross that of the earth and whose semimajor axes are smaller than that of the earth.
- attitudinally — in a manner expressive of personal attitudes or emotions
- attitudinized — Simple past tense and past participle of attitudinize.
- attitudinizer — One who attitudinizes, or practises poses.
- attitudinizes — Third-person singular simple present indicative form of attitudinize.
- audiocassette — a cassette containing audiotape
- austin dobson — (Henry) Austin, 1840–1921, English poet, biographer, and essayist.
- australia day — a public holiday in Australia, commemorating the landing of the British in 1788: observed on January 26
- authenticated — Prove or show (something, esp. a claim or an artistic work) to be true or genuine.
- autodidactism — Alternative form of autodidacticism.
- autodigestion — (biology) The digestion of tissue by enzymes produced by the organism itself.
- autooxidation — autoxidation.
- autopolyploid — (of cells, organisms, etc) having more than two sets of haploid chromosomes inherited from a single species
- autoradiogram — autoradiograph
- autoschediasm — anything done with little forethought or preparation
- autoschediaze — to do or act with little forethought or preparation
- avant-gardism — the attitudes, techniques, etc., of the cultural avant-garde.
- backwardation — the difference between the spot price for a commodity, including rent and interest, and the forward price
- bacteriocidal — Alternative spelling of bactericidal.
- badminton cup — a long refreshing drink of claret with soda water and sugar
- balanced diet — a diet consisting of the proper quantities and proportions of foods needed to maintain health or growth.
- baltic shield — the wide area of ancient rock in Scandinavia
- bandicoot rat — any of three burrowing rats of the genera Bandicota and Nesokia, of S and SE Asia: family Muridae
- bank discount — interest on a loan deducted from the principal amount when the loan is made and based on the loan's face value