19-letter words containing t, h, o, r
- rake over the coals — a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Compare anthracite, bituminous coal, lignite.
- rap on the knuckles — a mild reprimand or light sentence
- rapture of the deep — nitrogen narcosis.
- reflux oesophagitis — inflammation of the gullet caused by regurgitation of stomach acids, producing heartburn: may be associated with a hiatus hernia
- research laboratory — place for scientific experimentation
- resorcinolphthalein — fluorescein.
- reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
- 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?”.
- 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.
- right-eyed flounder — any of several flatfishes of the family Pleuronectidae, having both eyes on the right side of the head.
- run into the ground — to do too long or too often; overdo
- run-length encoding — A kind of compression algorithm which replaces sequences ("runs") of consecutive repeated characters (or other units of data) with a single character and the length of the run. This can either be applied to all input characters, including runs of length one, or a special character can be used to introduce a run-length encoded group. The longer and more frequent the runs are, the greater the compression that will be achieved. This technique is particularly useful for encoding black and white images where the data units would be single bit pixels.
- 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.
- sandwich generation — the generation of people still raising their children while having to care for their aging parents.
- sb's spiritual home — your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there
- 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.
- seleucia tracheotis — an ancient city in SE Asia Minor, on the River Calycadnus (modern Goksu Nehri): captured by the Turks in the 13th century; site of present-day Silifke (Turkey)
- sell down the river — a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels.
- sermon on the mount — a discourse delivered by Jesus to the disciples and others, containing the Beatitudes and important fundamentals of Christian teaching. Matt. 5–7; Luke 6:20–49.
- 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.
- sheet flood erosion — Geology. erosion by sheets of running water, rather than by streams.
- ship-to-shore radio — a radio that carries communications between land and sea
- shoestring potatoes — potatoes cut into long, very narrow strips and fried crisp in deep fat
- shoestring root rot — oak-root rot.
- short-stay car park — a car park where a car can be left for a relatively short time
- short-tail business — Short-tail business is insurance business where it is known that claims will be made and settled quickly.
- shortness of breath — respiratory difficulty
- shovelnose sturgeon — a small sturgeon, Scaphirhynchus platorhynchus, of the Mississippi River, having a broad, flat snout.
- simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
- social anthropology — study of human culture
- 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.
- 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.
- 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.
- spherical astronomy — the branch of astronomy dealing with the determination of the positions of celestial bodies on the celestial sphere.
- 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.
- spread oneself thin — to draw, stretch, or open out, especially over a flat surface, as something rolled or folded (often followed by out).
- st. anthony's cross — a T -shaped cross.
- 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.
- steady state theory — a theory in which the universe is assumed to have average properties that are constant in space and time so that new matter must be continuously and spontaneously created to maintain average densities as the universe expands.
- steady-state theory — a cosmological theory postulating that the universe exists throughout time in a steady state such that the average density of matter does not vary with distance or time. Matter is continuously created in the space left by the receding stars and galaxies of the expanding universe
- stochastic variable — a random variable.