18-letter words containing r, y, o
- crystal oscillator — a clear, transparent mineral or glass resembling ice.
- cultural sociology — the study of the origins and development of societal institutions, norms, and practices.
- cushing's syndrome — a medical condition characterized by obesity, hypertension, excessive hair growth, etc., caused by an overactive adrenal gland or large doses of corticosteroids
- cyclopean concrete — concrete containing stones larger than 6 inches (15 cm).
- cyrano de bergerac — Savinien (savinjɛ̃). 1619–55, French writer and soldier, famous as a duellist and for his large nose. He became widely known through the verse drama Cyrano de Bergerac (1897) by Edmond Rostand
- cytoarchitectonics — Cytoarchitecture.
- david lloyd george — David, 1st Earl of Dwyfor [doo-vawr] /ˈdu vɔr/ (Show IPA), 1863–1945, British statesman: prime minister 1916–22.
- decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
- depository library — a library designated by law to receive without charge all or a selection of the official publications of a government.
- developing country — a nonindustrialized poor country that is seeking to develop its resources by industrialization
- dictionary catalog — a library catalog having all its entries, including authors, titles, subjects, etc., in one general alphabetical sequence.
- diethylstilbestrol — a nonsteroidal synthetic estrogen, C 18 H 20 O 2 , used in medicine chiefly in the treatment of menopausal symptoms and in animal feeds for chemical caponization: formerly used during pregnancy for the prevention of miscarriage but discontinued owing to its association with an increased risk of vaginal and cervical cancers in women having had fetal exposure. Abbreviation: DES.
- dihydrotachysterol — a white, crystalline, water-insoluble sterol, C 28 H 46 O, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
- diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
- discourse analysis — the study of the rules or patterns characterizing units of connected speech or writing longer than a sentence.
- disorderly conduct — any of various petty misdemeanors, generally including nuisances, breaches of the peace, offensive or immoral conduct in public, etc.
- display postscript — An extended form of PostScript permitting its interactive use with bitmap displays.
- disproportionality — not in proportion; disproportionate.
- disproportionately — not proportionate; out of proportion, as in size or number.
- distributed memory — (architecture) The kind of memory in a parallel processor where each processor has fast access to its own local memory and where to access another processor's memory it must send a message via the inter-processor network. Opposite: shared memory.
- doctype decoration — (humour) When a web author adds a doctype declaration but doesn't bother to write valid HTML.
- domremy-la-pucelle — a village in Lorraine, NE France, SW of Nancy: birthplace of Joan of Arc.
- dry-powder inhaler — A dry-powder inhaler is a device that delivers medication to the lungs in the form of a dry powder.
- duchenne dystrophy — the most common form of muscular dystrophy, usually affecting only boys
- duty-free shopping — the making of duty-free purchases
- dysthymic disorder — a psychiatric disorder characterized by generalized depression that lasts for at least a year
- each and every one — all
- eat your heart out — Anatomy. a hollow, pumplike organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers: a right atrium that receives blood returning from the body via the superior and inferior vena cavae, a right ventricle that pumps the blood through the pulmonary artery to the lungs for oxygenation, a left atrium that receives the oxygenated blood via the pulmonary veins and passes it through the mitral valve, and a left ventricle that pumps the oxygenated blood, via the aorta, throughout the body.
- economic geography — a branch of geography that deals with the relation of physical and economic conditions to the production and utilization of raw materials and their manufacture into finished products.
- ecosystem services — the important benefits for human beings that arise from healthily functioning ecosystems, notably production of oxygen, soil genesis, and water detoxification
- electrocyclization — (organic chemistry) an electrocyclic reaction.
- electrodynamometer — An instrument that measures electric current by indicating the strength of repulsion or attraction between the magnetic fields of two sets of coils, one fixed and one movable.
- electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
- embryonic membrane — any of several living membranes enclosing or closely associated with the developing vertebrate embryo, as the allantois, amnion, yolk sac, etc.
- emotional literacy — the ability to deal with one's emotions and recognize their causes
- employment service — (in the United States) a government department established to collect and supply to the unemployed information about job vacancies and to employers information about availability of prospective workers
- energy consumption — amount of energy used
- environment agency — an official agency providing information on environmental issues, esp rivers, flooding and pollution
- european community — an economic and political association of European States that came into being in 1967, when the legislative and executive bodies of the European Economic Community merged with those of the European Coal and Steel Community and the European Atomic Energy Community: subsumed into the European Union in 1993
- every now and then — from time to time; occasionally
- evolution strategy — (ES) A kind of evolutionary algorithm where individuals (potential solutions) are encoded by a set of real-valued "object variables" (the individual's "genome"). For each object variable an individual also has a "strategy variable" which determines the degree of mutation to be applied to the corresponding object variable. The strategy variables also mutate, allowing the rate of mutation of the object variables to vary. An ES is characterised by the population size, the number of offspring produced in each generation and whether the new population is selected from parents and offspring or only from the offspring. ES were invented in 1963 by Ingo Rechenberg, Hans-Paul Schwefel at the Technical University of Berlin (TUB) while searching for the optimal shapes of bodies in a flow.
- fallot's tetralogy — a congenital heart disease in which there are four defects: pulmonary stenosis, enlarged right ventricle, a ventricular septal defect, and an aorta whose origin lies over the septal defect. In babies suffering this disease the defects can be corrected by surgery
- family-tree theory — a theory that describes language change in terms of genetically related languages developing in successive splits from a common parent language, such as Indo-European, as depicted by a family tree diagram.
- farmer-labor party — a political party in Minnesota, founded in 1920 and merged with the Democratic Party in 1944.
- fast-food industry — the industry surrounding fast-food restaurants
- fatty degeneration — deterioration of the cells of the body, accompanied by the formation of fat globules within the diseased cells.
- feast of orthodoxy — a solemn festival held on the first Sunday of Lent (Orthodoxy Sunday) commemorating the restoration of the use of icons in the church (a.d. 842) and the triumph over all heresies.
- fifth monarchy men — (during the Commonwealth in the 17th century) a militant sect of Puritans who identified the fifth monarchy with the millennial reign of Christ and who believed they should help to inaugurate that reign by force.
- fire in your belly — If you say that someone has fire in their belly, you are expressing approval of them because they are energetic, enthusiastic, and have very strong feelings.
- first duke of york — a member of the royal house of England that ruled from 1461 to 1485.