19-letter words containing a, d, r, t
- rapture of the deep — nitrogen narcosis.
- reactive depression — depression occurring in response to some situational stress, as loss of one's job.
- recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
- redress the balance — to make a fair adjustment; see that justice is done
- reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
- registered disabled — on a local authority register under the Chronically Sick and Disabled Persons Act 1970
- reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
- relational database — an electronic database comprising multiple files of related information, usually stored in tables of rows (records) and columns (fields), and allowing a link to be established between separate files that have a matching field, as a column of invoice numbers, so that the two files can be queried simultaneously by the user.
- relative impediment — a fact or circumstance that disqualifies from lawful marriage persons who are closely related.
- religious education — religion as school subject
- removable cartridge — a hard disk enclosed in a case that can be removed from the disk drive, having more storage than floppy disks.
- reserved occupation — in time of war, an occupation from which one will not be called up for military service
- 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.
- resplendent quetzal — See under quetzal (def 1).
- 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.
- rickettsial disease — any of several acute infectious diseases caused by ticks, mites, or body lice infected with rickettsiae. The main types include typhus, spotted fever, Q fever, trench fever, and tsutsugamushi disease
- rio grande do norte — a state in E Brazil. 20,464 sq. mi. (53,000 sq. km). Capital: Natal.
- romanian tenderloin — a cut of beef consisting of the diaphragm muscle.
- royal correspondent — a journalist who reports on matters relating to royalty
- saber-toothed tiger — any of several extinct members of the cat family Felidae from the Oligocene to Pleistocene Epochs, having greatly elongated, saberlike upper canine teeth.
- sabre-toothed tiger — any of various extinct Tertiary felines of the genus Smilodon and related genera, with long curved upper canine teeth
- saccharolactic acid — mucic acid.
- saddle-billed stork — a large stork, Ephippiorhynchus senegalensis, of West Africa, having a white and black body and a long, red and black bill.
- saint patrick's day — March 17, observed by the Irish in honor of St. Patrick, the patron saint of Ireland.
- samoa standard time — a standard time used in the zone which includes American Samoa, corresponding to the mean solar time of the 165th meridian west of Greenwich, England: it is eleven hours behind Greenwich time
- sandwich generation — the generation of people still raising their children while having to care for their aging parents.
- santa rosa de copan — a town in W Honduras: site of extensive Mayan ruins.
- santiago del estero — a city in N Argentina.
- 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 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.
- self-administration — the management of any office, business, or organization; direction.
- self-aggrandizement — increase of one's own power, wealth, etc., usually aggressively.
- self-discrimination — an act or instance of discriminating, or of making a distinction.
- semiconductor laser — a laser in which a semiconductor is the light-emitting source, used in many medical procedures.
- semidetached binary — a pair of stars that are so close together that mass transfer occurs from one to the other
- semipalmated plover — a New World plover, Charadrius semipalmatus, having a black ring around the chest and semipalmate feet, inhabiting beaches and salt marshes.
- senatorial district — one of a fixed number of districts into which a state of the U.S. is divided, each electing one member to the state senate.
- sensory deprivation — the experimental or natural reduction of environmental stimuli, as by physical isolation or loss of eyesight, often leading to cognitive, perceptual, or behavioral changes, as disorientation, delusions, or panic.
- 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.
- ship-to-shore radio — a radio that carries communications between land and sea
- shipping department — a department in a company responsible for arranging, receiving, recording, and sending shipments of goods