19-letter words containing d, u, e, l, r
- dereliction of duty — Dereliction of duty is deliberate or accidental failure to do what you should do as part of your job.
- developable surface — a surface that can be flattened onto a plane without stretching or compressing any part of it, as a circular cone.
- diamond-leaf laurel — a tree, Pittosporum rhombifolium, of Australia, having coarsely toothed, oval or diamond-shaped leaves and white flowers, widely planted as an ornamental in the southwestern U.S.
- differential backup — (operating system) A kind of backup that copies all files that have changed since the last full backup. Each differential backup will include all files in previous differential backups since the full backup so to restore a version of a file, you only need to search the full backup and the relevant differential backup. Some systems support differential backup by associating an "Archive" flag with each file and setting this flag whenever the file is modified to indicate that it should be included in the next backup. A differential backup does not change this flag, whereas an incremental backup resets it.
- directional coupler — (communications) (tap) A passive device used in cable systems to divide and combine radio frequency signals. A directional coupler has at least three ports: line in, line out, and the tap. The signal passes between line in and line out ports with loss referred to as the insertion loss. A small portion of the signal power applied to the line in port passes to the tap port. A signal applied to the tap port is passed to the line in port less the tap attenuation value. The tap signals are isolated from the line out port to prevent reflections. A signal applied to the line out port passes to the line in port and is isolated from the tap port. Some devices provide more than one tap output line (multi-taps).
- dollard-des-ormeaux — a town in S Quebec, in E Canada: suburb of Montreal.
- double counterpoint — invertible counterpoint using two transposable voices.
- double-helical gear — herringbone gear.
- early purple orchid — a Eurasian orchid, Orchis mascula, with purplish-crimson flowers and stems marked with blackish-purple spots
- ebola virus disease — Also called Ebola fever, Ebola hemorrhagic fever, Ebola virus disease. a usually fatal disease, a type of hemorrhagic fever, caused by the Ebola virus and marked by high fever, severe gastrointestinal distress, and bleeding.
- educational adviser — a person who provides advice and training to teachers about teaching methods and educational policies
- electroconductivity — Electrical conductivity.
- environmental audit — the systematic examination of an organization's interaction with the environment, to assess the success of its conservation or antipollution programme
- euclidean algorithm — Euclid's Algorithm
- fluoride toothpaste — toothpaste containing a small amount of fluoride as protection against tooth decay
- free alongside quay — (of a shipment of goods) delivered to the quay without charge to the buyer
- giraldus cambrensis — literary name of Gerald de Barri. ?1146–?1223, Welsh chronicler and churchman, noted for his accounts of his travels in Ireland and Wales
- gloucester old spot — a hardy rare breed of pig, white with a few black markings, that originally lived off windfalls in orchards in the Severn valley
- go round in circles — to engage in energetic but fruitless activity
- godfrey of bouillon — (Duke of Lower Lorraine) 1060?–1100, French leader of the First Crusade 1096–99.
- goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
- grand duke nicholas — of Cusa [kyoo-zuh] /ˈkyu zə/ (Show IPA), 1401–1464, German cardinal, mathematician, and philosopher. German Nikolaus von Cusa.
- ground-plane aerial — a quarter-wave vertical dipole aerial in which the electrical image forming the other quarter-wave section is formed by reflection in a system of radially disposed metal rods or in a conductive sheet
- guillaume de lorris — 13th-century French poet who wrote the first 4058 lines of the allegorical romance, the Roman de la rose, continued by Jean de Meung
- handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
- high blood pressure — elevation of the arterial blood pressure or a condition resulting from it; hypertension. Abbreviation: HBP.
- household insurance — an arrangement in which you pay money to a company, and they pay money to you if your household goods are stolen or damaged
- hudson river school — a group of American painters of the mid-19th century whose works are characterized by a highly romantic treatment of landscape, especially along the Hudson River.
- industrial accident — an accident that happens to an employee of an industrial company during the course of their work
- industrial medicine — the study and practice of the health care of employees of large organizations, including measures to prevent accidents, industrial diseases, and stress in the workforce and to monitor the health of executives
- industrial-strength — unusually strong, potent, or the like: heavy-duty: an industrial-strength soap.
- installed user base — user base
- interstellar medium — the matter occurring between the stars of our Galaxy, largely in the spiral arms, and consisting mainly of huge clouds of ionized, neutral, or molecular hydrogen
- isidorus of miletus — flourished 6th century a.d, Byzantine engineer. He was one of the architects of Hagia Sophia; (originally an Orthodox cathedral and currently a museum in Istanbul, Turkey).
- judicial conference — a conference of judges held to discuss improvements in methods or judicial procedure through court rules or otherwise.
- judicial separation — a decree of legal separation of spouses that does not dissolve the marriage bond.
- junior middleweight — a boxer weighing up to 154 pounds (69.3 kg), between welterweight and middleweight.
- large munsterlander — a strongly built gun dog with a long dense black-and-white coat
- least recently used — (operating systems) (LRU) A rule used in a paging system which selects a page to be paged out if it has been used (read or written) less recently than any other page. The same rule may also be used in a cache to select which cache entry to flush. This rule is based on temporal locality - the observation that, in general, the page (or cache entry) which has not been accessed for longest is least likely to be accessed in the near future.
- lighten sb's burden — If someone or something lightens your burden or your load, they make a bad or difficult situation better for you.
- louis ii de bourbon — Condé, Prince de.
- lucia di lammermoor — an opera (1835) by Gaetano Donizetti, based on Sir Walter Scott's novel The Bride of Lammermoor.
- mary mcleod bethune — Mary McLeod [muh-kloud] /məˈklaʊd/ (Show IPA), 1875–1955, U.S. educator and civil-rights leader.
- midnight regulation — a rule or directive approved by the federal government near the end of a president’s term of office
- molybdenum trioxide — a white, crystalline, sparingly water-soluble powder, MoO 3 , used chiefly in the manufacture of molybdenum compounds.
- 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.
- mucopolysaccharides — Plural form of mucopolysaccharide.
- muhammadan calendar — Muslim calendar.
- mulheim an der ruhr — a city in North Rhine-Westphalia, W Germany, near Essen.