19-letter words containing r, s
- simple closed curve — a curve that is closed and that has no loops or points missing; a curve for which there exists a homeomorphism mapping it to a circle.
- single-cell protein — a protein produced or derived from the culture of a single-celled organism, used as a food supplement or substitute. Abbreviation: SCP.
- sir wilfrid laurier — Sir Wilfrid [wil-frid;; French weel-freed] /ˈwɪl frɪd;; French wilˈfrid/ (Show IPA), 1841–1919, Canadian statesman: prime minister 1896–1911.
- sissinghurst castle — a restored Elizabethan mansion near Cranbrook in Kent: noted for the gardens laid out in the 1930s by Victoria Sackville-West and Harold Nicolson
- slate-colored junco — the eastern subspecies of the dark-eyed junco, Junco hyemalis, having grayer plumage than the several western subspecies.
- sleepy hollow chair — an armchair of the mid-19th century, sometimes on rockers, having a single piece forming a high upholstered back and a concave upholstered seat.
- slugging percentage — a number expressing a player's average effectiveness in making extra-base hits, calculated by dividing the total number of bases (from all singles, doubles, triples, and home runs) by the number of official at bats
- slum clearance area — an area that has been designated for, or been subject to, the rehousing of its inhabitants and subsequent demolition and rebuilding
- small advertisement — a short, simply designed advertisement in a newspaper or magazine, usually set entirely in a small size of type
- smokestack industry — A smokestack industry is a traditional industry such as heavy engineering or manufacturing, rather than a modern industry such as electronics.
- smoking compartment — a compartment of a train where smoking is permitted
- social anthropology — study of human culture
- social organization — the structure of social relations within a group, usually the relations between its subgroups and institutions.
- social security act — a law passed in 1935 providing old-age retirement insurance, a federal-state program of unemployment compensation, and federal grants for state welfare programs.
- sodium hydrosulfite — a white, crystalline, water-soluble powder, Na 2 S 2 O 4 , used as a reducing agent, especially in dyeing, and as a bleach.
- sodium hypochlorite — a pale-green, crystalline compound, NaOCl, unstable in air, soluble in cold water, decomposes in hot water: used as a bleaching agent for paper and textiles, in water purification, in household use, and as a fungicide.
- soft-shelled turtle — any of numerous aquatic turtles of the family Trionychidae, inhabiting North America, Asia, and Africa, having the shell covered with flexible, leathery skin instead of horny plates.
- solar neutrino unit — Astronomy. a unit equal to 10 −36 neutrino captures per second per target atom, used as a measure of the flux of neutrino radiation from the sun. Abbreviation: SNU.
- solid of revolution — a three-dimensional figure formed by revolving a plane area about a given axis.
- someone's writ runs — someone has power or authority of a specified kind or scope
- south african dutch — the Boers.
- south san francisco — a city in central California.
- southern crab apple — a tree, Malus angustifolia, of the eastern U.S., having oblong leaves, fragrant, pink or rose-colored flowers, and small, round, yellow-green fruit.
- southern hemisphere — the half of the earth between the South Pole and the equator.
- soviet central asia — the region of the former Soviet Union now occupied by Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan
- spanish west africa — a former overseas territory of Spain in NW Africa: divided in 1958 into the overseas provinces of Ifni and Spanish Sahara
- spare a thought for — If you spare a thought for an unfortunate person, you make an effort to think sympathetically about them and their bad luck.
- special air service — a regiment in the British Army specializing in clandestine operations
- special partnership — limited partnership.
- specific characters — the persistent features that distinguish one species from all others
- specific resistance — resistivity (def 2).
- specific-resistance — the power or property of resistance.
- specular reflection — Specular reflection is reflection of heat or light in which the angles of different parts of the surface are important.
- sphere of influence — any area in which one nation wields dominant power over another or others.
- spherical astronomy — the branch of astronomy dealing with the determination of the positions of celestial bodies on the celestial sphere.
- spider-hunting wasp — any solitary wasp of the superfamily Pompiloidea, having a slender elongated body: the fast-running female hunts spiders as a food store for her larvae
- spin quantum number — the quantum number that designates the total angular momentum associated with electron spin and has a value of ½ in units of h /2π.
- spirit of hartshorn — a colorless, pungent, suffocating, aqueous solution of about 28.5 percent ammonia gas: used chiefly as a detergent, for removing stains and extracting certain vegetable coloring agents, and in the manufacture of ammonium salts.
- splinterproof glass — glass that is designed not to form sharp splinters should it be shattered
- spotted wintergreen — an evergreen plant, Chimaphila maculata, of central North America, having leaves with mottled-white veins and white, fragrant flowers.
- spread oneself thin — to draw, stretch, or open out, especially over a flat surface, as something rolled or folded (often followed by out).
- squirrel-tail grass — any of various grasses having long fruiting stalks.
- st. anthony's cross — a T -shaped cross.
- st. augustine grass — a low, mat-forming grass, Stenotaphrum secundatum, of the southern U.S. and tropical America, that is cultivated as a lawn grass.
- st. lawrence seaway — a series of channels, locks, and canals between Montreal and the mouth of Lake Ontario, a distance of 182 miles (293 km), enabling most deep-draft vessels to travel from the Atlantic Ocean, up the St. Lawrence River, to all the Great Lakes ports: developed jointly by the U.S. and Canada.
- st.-germain-en-laye — a city in N France, near Paris: royal château and forest; treaties 1570, 1632, 1679, 1919.
- stabilization print — a print made by the stabilization process.
- staff-student ratio — the ratio of teachers to pupils or students in a school, college, or university
- stakeholder pension — In Britain, a stakeholder pension is a flexible pension scheme with low charges. Both employees and the state contribute to the scheme, which is optional, and is in addition to the basic state pension.
- standard atmosphere — an arbitrarily determined vertical distribution of atmospheric pressure, temperature, and density, assumed to have physical constants and conforming to parametric equations, used for calculations in ballistics, the design of pressure altimeters, etc.