19-letter words containing o, n, c, a
- relational calculus — (database) An operational methodolgy, founded on predicate calculus, dealing with descripitive expressions that are equivalent to the operations of relational algebra. Codd's reduction algorithm can convert from relational calculus to relational algebra. Two forms of the relational calculus exist: the tuple calculus and the domain calculus.
- relative complement — the set of elements contained in a given set that are not elements of another specified set.
- religious education — religion as school subject
- relocation expenses — Relocation expenses are a sum of money that a company pays to someone who moves to a new area in order to work for the company. The money is to help them pay for moving house.
- repeat prescription — A repeat prescription is a prescription for a medicine that you have taken before or that you use regularly.
- republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
- republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
- reserved occupation — in time of war, an occupation from which one will not be called up for military service
- resistance movement — a movement fighting (for freedom, etc), often secretly or illegally, against an invader in an occupied country or against the country's government, etc
- resonance radiation — radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule.
- resorcinolphthalein — fluorescein.
- reticular formation — a network of neurons in the brainstem involved in consciousness, regulation of breathing, the transmission of sensory stimuli to higher brain centers, and the constantly shifting muscular activity that supports the body against gravity.
- reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
- reversible reaction — a reaction that, depending on ambient conditions, can proceed in either of two directions: the production of the reaction products from the reactants, or the production of the original reactants from the formed reaction products. Compare equilibrium (def 4).
- rhetorical question — a question asked solely to produce an effect or to make an assertion and not to elicit a reply, as “What is so rare as a day in June?”.
- rhodesian ridgeback — a large short-haired breed of dog characterized by a ridge of hair growing along the back in the opposite direction to the rest of the coat. It was originally a hunting dog from South Africa
- right circular cone — a cone whose surface is generated by lines joining a fixed point to the points of a circle, the fixed point lying on a perpendicular through the center of the circle.
- rocky mountain goat — a long-haired, white, antelopelike wild goat, Oreamnos americanus, of mountainous regions of western North America, having short, black horns.
- royal correspondent — a journalist who reports on matters relating to royalty
- saccharofarinaceous — pertaining to or consisting of sugar and meal.
- sackcloth and ashes — a public display of extreme grief, remorse, or repentance
- sacramento sturgeon — white sturgeon.
- san francisco peaks — a mountain mass in N Arizona: highest point in the state, Humphrey's Peak, 12,611 feet (3845 meters).
- san juan capistrano — a city in SW California: site of old Spanish mission; known for annual return of swallows, said to occur on March 19.
- sandra day o'connor — Frank (Michael Donovan) 1903–66, Irish writer.
- sandwich generation — the generation of people still raising their children while having to care for their aging parents.
- sanitary protection — Sanitary protection is sanitary towels or tampons.
- santa rosa de copan — a town in W Honduras: site of extensive Mayan ruins.
- saturation coverage — news coverage (of an event, etc) that is very thorough in order not to miss any details
- save someone's neck — to help someone else escape from such a situation
- scale down (or up) — to reduce (or increase), often according to a fixed ratio or proportion
- scare the pants off — to scare extremely
- scattersite housing — public housing, especially for low-income families, built throughout an urban area rather than being concentrated in a single neighborhood.
- scientific notation — a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power, as 1385.62 written as 1.386 × 10 3 .
- screen actors guild — a labor union for motion-picture performers, founded in 1933. Abbreviation: SAG.
- secondary dentition — the permanent dentition
- secondary education — education at high-school level
- secondary infection — an infection resulting from another infection
- secondary intention — See under intention (def 5b).
- secondary picketing — the picketing by strikers of a place of work that supplies goods to or distributes goods from their employer
- secondary processes — the conscious mental activity and logical thinking controlled by the ego and influenced by environmental demands.
- secondary qualities — one of the qualities attributed by the mind to an object perceived, such as color, temperature, or taste.
- secondary structure — the arrangement of a polypeptide into a regular alpha helix, beta structure, or random coil configuration by the formation of intramolecular hydrogen bonds along the length of the chain.
- secondary-intention — an act or instance of determining mentally upon some action or result.
- see one's way clear — to be willing (to do something)
- segmentation cavity — blastocoel.
- selective attention — mental focus on sth in particular
- self identification — identification of oneself with some other person or thing.
- self-congratulating — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
- self-congratulation — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.