19-letter words containing e, c, h, i
- reciprocal exchange — an unincorporated association formed so that its members can participate in reciprocal insurance.
- regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
- releasing mechanism — a hypothetical control complex in the central nervous system of animals that triggers the appropriate behavioral response to a releaser.
- republique malgache — French name of Malagasy Republic.
- research fellowship — the position or office of someone who conducts academic research into a subject at a university, etc
- 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?”.
- 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.
- ring up the curtain — to begin a theatrical performance
- 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.
- saccharofarinaceous — pertaining to or consisting of sugar and meal.
- samuel de champlain — Samuel de [sam-yoo-uh l duh;; French sa-my-el duh] /ˈsæm yu əl də;; French sa müˈɛl də/ (Show IPA), 1567–1635, French explorer in the Americas: founder of Quebec; first colonial governor 1633–35.
- sandwich generation — the generation of people still raising their children while having to care for their aging parents.
- 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 like hot cakes — a pancake or griddlecake.
- semidetached binary — a pair of stars that are so close together that mass transfer occurs from one to the other
- sharp-focus realism — photorealism.
- shopping facilities — shops or other retail services
- simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
- 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
- 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.
- 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.
- solid-state physics — the branch of physics that deals with the macroscopic physical properties of matter, especially solids; the study of the electromagnetic, structural, and thermodynamic properties of solids.
- son-of-a-bitch stew — (in the Old West) a stew often prepared by chuck-wagon cooks for working cowboys, containing tripe and often also the heart, liver, brains, kidney, etc., of a slaughtered steer.
- south pacific ocean — the part of the Pacific Ocean extending S from the Equator to the Antarctic continent.
- spanish west africa — a former overseas territory of Spain in NW Africa: divided in 1958 into the overseas provinces of Ifni and Spanish Sahara
- special partnership — limited partnership.
- specific characters — the persistent features that distinguish one species from all others
- 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.
- stochastic variable — a random variable.
- substitution cipher — a cipher that replaces letters of the plain text with another set of letters or symbols.
- superhigh frequency — any frequency between 3000 and 30,000 megahertz. Abbreviation: SHF.
- surface effect ship — a large, ship-size air cushion vehicle operated over water.
- sweetheart neckline — a neckline on a woman's garment, as a dress, with a high back and a low-cut front with two curved edges resembling the conventionalized shape of a heart.
- switchblade (knife) — a large jackknife that snaps open when a release button on the handle is pressed
- sympathetic contact — behavior toward an individual based on the individual's personal makeup rather than on his or her group membership.
- synchronous machine — an alternating-current machine in which the average speed of normal operation is exactly proportional to the frequency of the system to which it is connected.
- synthetic detergent — any synthetic substance, other than soap, that is an effective cleanser and functions equally well as a surface-active agent in hard or soft water.
- take (the) occasion — to use the opportunity (to do something)
- take it on the chin — the lower extremity of the face, below the mouth.
- teacher-pupil ratio — the number of teachers relative to the number of pupils in a particular school
- teaching fellowship — a fellowship providing a student in a graduate school with free tuition and expenses and stipulating that the student assume some teaching duties in return.
- technical institute — a higher-education institution
- tehachapi mountains — a transverse (E–W) mountain range in S central California. Highest peak, Double Mountain, 7982 feet (2433 meters).
- teilhard de chardin — Pierre [pyer] /pyɛr/ (Show IPA), 1881–1955, French Jesuit priest, paleontologist, and philosopher.
- telephone directory — a book, directory, or the like, usually containing an alphabetical list of telephone subscribers in a city or other area, together with their addresses and telephone numbers.