18-letter words containing u, d, a, i
- distance education — education in which students receive instruction over the Internet, from a video, etc., instead of going to school.
- distinguishability — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
- distribution class — form class
- distribution ratio — the ratio of concentrations of a solute distributed between two immiscible solvents in contact with each other, as iodine in water and chloroform
- division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
- dominican republic — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- double achievement — a representation of the arms of a husband beside those of his wife such that a difference of rank between them is shown.
- drainpipe trousers — trousers with very narrow legs
- dramatic monologue — a poetic form in which a single character, addressing a silent auditor at a critical moment, reveals himself or herself and the dramatic situation.
- driver's education — high-school driving classes
- ducking and diving — evasiveness
- dwarf storage unit — (humour) (DSU) An IBM term for a cupboard.
- dysfunctionalities — Plural form of dysfunctionality.
- east indian walnut — lebbek.
- eau de vie de marc — marc (def 2).
- established church — a Church that is officially recognized as a national institution, esp the Church of England
- euclid's algorithm — (algorithm) (Or "Euclidean Algorithm") An algorithm for finding the greatest common divisor (GCD) of two numbers. It relies on the identity gcd(a, b) = gcd(a-b, b) To find the GCD of two numbers by this algorithm, repeatedly replace the larger by subtracting the smaller from it until the two numbers are equal. E.g. 132, 168 -> 132, 36 -> 96, 36 -> 60, 36 -> 24, 36 -> 24, 12 -> 12, 12 so the GCD of 132 and 168 is 12. This algorithm requires only subtraction and comparison operations but can take a number of steps proportional to the difference between the initial numbers (e.g. gcd(1, 1001) will take 1000 steps).
- fast-food industry — the industry surrounding fast-food restaurants
- fettuccine alfredo — fettuccine in cream sauce with grated Parmesan cheese.
- first class module — (programming) A module that is a first class data object of the programming language, e.g. a record containing functions. In a functional language, it is standard to have first class programs, so program building blocks can have the same status.
- fissure of rolando — central sulcus.
- fixed-focus camera — a camera with an unadjustable focal length and with a relatively large depth of field.
- flash butt welding — a method of welding metal edge-to-edge with a powerful electric flash followed by the application of pressure.
- floating underflow — underflow
- foundation garment — an undergarment, as a girdle or corset, worn by women to support or give shape to the contours of the body.
- foundling hospital — an institutional home for foundlings.
- frederick douglass — Frederick, 1817–95, U.S. ex-slave, abolitionist, and orator.
- fuel-saving device — a device that increases the fuel efficiency of a vehicle, so that it uses less fuel for a further distance
- fulminating powder — powder that explodes by percussion.
- fuming nitric acid — a colorless, yellowish, or brownish fuming corrosive liquid, usually prepared from nitric acid by the addition of excess nitrogen dioxide: used in organic synthesis for nitration, and as an oxidizer in liquid propellants for rockets.
- functional disease — a disease in which there is an abnormal change in the function of an organ, but no structural alteration in the tissues involved (opposed to organic disease).
- funding operations — the conversion of government floating stock or short-term debt into holdings of long-term bonds
- gabriele dannunzio — Gabriele [Italian gah-bree-e-le] /Italian ˌgɑ briˈɛ lɛ/ (Show IPA), (Duca Minimo) 1863–1938, Italian soldier, novelist, and poet.
- galactic longitude — the angular distance in degrees measured eastward in the galactic plane from a radius drawn from the earth as center to the constellation Sagittarius.
- gamma distribution — a continuous two-parameter distribution from which the chi-square and exponential distributions are derived, written Gamma (α. β), where α and β are greater than zero, and defined in terms of the gamma function
- gas-discharge tube — any tube in which an electric discharge takes place through a gas
- giuseppe garibaldi — Giuseppe [juh-sep-ee;; Italian joo-zep-pe] /dʒəˈsɛp i;; Italian dʒuˈzɛp pɛ/ (Show IPA), 1807–82, Italian patriot and general.
- graduated cylinder — a narrow, cylindrical container marked with horizontal lines to represent units of measurement and used to precisely measure the volume of liquids.
- grand council fire — a formal gathering of camp fire members requiring a minimum attendance of three troops.
- grumbling appendix — a condition in which the appendix causes intermittent pain but appendicitis has not developed
- guidance counselor — advisor in schools
- gum digger's spear — a long steel probe used by gum diggers digging for kauri gum
- hebdomadal council — the governing council or senate of Oxford University
- hemidemisemiquaver — a sixty-fourth note.
- hit-and-run driver — sb: leaves accident scene
- honour moderations — (at Oxford University) the first public examination, in which candidates are placed into one of three classes of honours
- hydroflumethiazide — A diuretic drug.
- hyposulfurous acid — an acid, H 2 S 2 O 4 , next in a series below sulfurous acid, known only in solution or in the form of its salts.
- ifs, ands, or buts — a supposition; uncertain possibility: The future is full of ifs.
- indecent behaviour — the offence of committing indecent acts