19-letter words containing a, l, u, d, i
- midnight regulation — a rule or directive approved by the federal government near the end of a president’s term of office
- missing fundamental — a tone, not present in the sound received by the ear, whose pitch is that of the difference between the two tones that are sounded
- mordvinian republic — a constituent republic of W central Russia, in the middle Volga basin. Capital: Saransk. Pop: 888 700 (2002). Area: 26 200 sq km (10 110 sq miles)
- mount desert island — an island off the coast of E central Maine: summer resort; forms part of Acadia National Park. 14 miles (23 km) long; 8 miles (13 km) wide.
- mousseline de laine — a thin worsted fabric, often having a printed pattern.
- mucopolysaccharides — Plural form of mucopolysaccharide.
- mulheim an der ruhr — a city in North Rhine-Westphalia, W Germany, near Essen.
- multidimensionality — The property of being multidimensional.
- multimedia analysis — Multimedia analysis is the consideration of all possible risks relating to pollution and waste management.
- municipal bond fund — a mutual fund that invests in municipal bonds.
- non-distinguishable — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
- normal distribution — a theoretical frequency distribution represented by a normal curve.
- nuclear disarmament — the gradual reduction and eventual elimination of all nuclear weapons in the world
- oak-leaved geranium — a geranium, Pelargonium quercifolium, of southern Africa, having oaklike leaves with purple veins and sparse clusters of purple flowers with darker markings.
- occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
- old church slavonic — the oldest attested Slavic language, an ecclesiastical language written first by Cyril and Methodius in a Bible translation of the 9th century and continued in use for about two centuries. It represents the South Slavic, Bulgarian dialect of 9th-century Salonika with considerable addition of other South and West Slavic elements. Abbreviation: OCS.
- old spanish customs — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
- olive-backed thrush — Swainson's thrush.
- optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- parliament building — structure housing legislative offices
- peroxysulfuric acid — persulfuric acid (def 1).
- perpetual adoration — uninterrupted adoration of the Blessed Sacrament.
- police headquarters — building where police are stationed
- preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
- production platform — offshore power station
- profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
- pseudo-biographical — of or relating to a person's life: He's gathering biographical data for his book on Milton.
- pseudo-experimental — pertaining to, derived from, or founded on experiment: an experimental science.
- pseudo-intellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
- pseudo-professional — following an occupation as a means of livelihood or for gain: a professional builder.
- pseudopsychological — of or relating to psychology.
- queensland lungfish — a lungfish, Neoceratodus forsteri, reaching a length of six feet: occurs in Queensland rivers but introduced elsewhere
- radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
- radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
- reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
- regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
- reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
- religious education — religion as school subject
- republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
- reticulated tracery — tracery consisting in large part of a netlike arrangement of repeated geometrical figures.
- reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
- rural free delivery — former name for rural delivery service. Abbreviation: R.F.D.
- samuel de champlain — Samuel de [sam-yoo-uh l duh;; French sa-my-el duh] /ˈsæm yu əl də;; French sa müˈɛl də/ (Show IPA), 1567–1635, French explorer in the Americas: founder of Quebec; first colonial governor 1633–35.
- screen actors guild — a labor union for motion-picture performers, founded in 1933. Abbreviation: SAG.
- secondary qualities — one of the qualities attributed by the mind to an object perceived, such as color, temperature, or taste.
- semiconductor laser — a laser in which a semiconductor is the light-emitting source, used in many medical procedures.
- sexual reproduction — reproduction involving the union of gametes.
- sharp-tailed grouse — a grouse, Pedioecetes phasianellus, of prairies and open forests of western North America, similar in size to the prairie chicken but with a more pointed tail.
- sidereal hour angle — the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
- sir wilfrid laurier — Sir Wilfrid [wil-frid;; French weel-freed] /ˈwɪl frɪd;; French wilˈfrid/ (Show IPA), 1841–1919, Canadian statesman: prime minister 1896–1911.