13-letter words containing a, d, t
- 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 loose ends — in an unsettled, disorganized, or confused condition
- at the double — at twice normal marching speed
- 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.
- attested form — a linguistic form that can be shown to be in use or in written records
- attested herd — a herd of cattle, etc that has been certified as being free from a disease, esp from tuberculosis
- 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.
- auto-destruct — self-destruct.
- 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
- autoresponder — A program that automatically generates a set response to all messages sent to a particular e-mail address.
- 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.
- balanced step — any of a series of staircase winders so planned that they are nearly as wide at the inside of the stair as the adjacent fliers.
- balanced tree — (algorithm) An optimisation of a tree which aims to keep equal numbers of items on each subtree of each node so as to minimise the maximum path from the root to any leaf node. As items are inserted and deleted, the tree is restructured to keep the nodes balanced and the search paths uniform. Such an algorithm is appropriate where the overheads of the reorganisation on update are outweighed by the benefits of faster search. A B-tree is a kind of balanced tree that can have more than two subtrees at each node (i.e. one that is not restricted to being a binary tree).
- ballad stanza — a four-line stanza, often used in ballads, in which the second and fourth lines rhyme and have three stresses each and the first and third lines are unrhymed and have four stresses each
- ballet dancer — a man or woman who takes part in ballet dancing, usually professionally
- baltic shield — the wide area of ancient rock in Scandinavia
- band spectrum — a spectrum consisting of a number of bands of closely spaced lines that are associated with emission or absorption of radiation by molecules
- band together — If people band together, they meet and act as a group in order to try and achieve something.
- 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
- basidiomycete — any fungus of the phylum Basidiomycota (formerly class Basidiomycetes), in which the spores are produced in basidia. The group includes boletes, puffballs, smuts, and rusts
- basket dinner — a group social gathering, as of church members, to which participants contribute casseroles or other dishes to share.
- bastard amber — a color of gelatin commonly used in stage lighting, similar to light amber but having a pinkish cast.
- bastard eigne — the first-born illegitimate son of parents whose second son was legitimate.
- bastard title — half title (def 1).
- bastard-title — Also called bastard title. the first printed page of certain books, appearing after the end papers and before the title page and containing only the title of the book.
- bat-eared fox — a fox, Vulpes chama, inhabiting dry areas of southern Africa and having large pointed ears, silvery gray coat, and a bushy tail with a black tip.