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20-letter words containing i, s, a, c, h, r

  • orthopaedic mattress — a specially firm mattress designed to help correct or ameliorate the discomfort of disorders of the spine and joints
  • orthophosphoric acid — a colorless, crystalline solid, H 3 PO 4 , the tribasic acid of pentavalent phosphorus: used chiefly in fertilizers, as a source of phosphorus salts, and in soft drinks as an acidulant and flavoring agent.
  • overenthusiastically — With excessive enthusiasm.
  • peroxysulphuric acid — a white hygroscopic crystalline unstable oxidizing acid. Formula: H2SO5
  • phosphoric anhydride — phosphorus pentoxide.
  • photogelatin process — collotype (def 1).
  • physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • pipeline burst cache — (hardware, storage)   (PB Cache) A synchronous cache built from pipelined SRAM. A cache in which reading or writing a new location takes multiple cycles but subsequent locations can be accessed in a single cycle. On Pentium systems in 1996, pipeline burst caches are frequently used as secondary caches. The first 8 bytes of data are transferred in 3 CPU cycles, and the next 3 8-byte pieces of data are transferred in one cycle each.
  • polyanthus narcissus — a Eurasian amaryllidaceous plant, Narcissus tazetta, having clusters of small yellow or white fragrant flowers
  • post-synchronization — the recording of dialogue and sound effects in synchronization with the picture after the film has been shot.
  • potassium bichromate — an orange-red, crystalline, water-soluble, poisonous powder, K 2 Cr 2 O 7 , used chiefly in dyeing, photography, and as a laboratory reagent.
  • potassium dichromate — an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7
  • prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
  • psychiatric hospital — institution treating mental disorders
  • pyroligneous alcohol — methyl alcohol.
  • rachel louise carson — Christopher ("Kit") 1809–68, U.S. frontiersman and scout.
  • ring-necked pheasant — a gallinaceous Asian bird, Phasianus colchicus, having a white band around its neck, introduced into Great Britain, North America, and the Hawaiian Islands.
  • rise to the occasion — to have the courage, wit, etc, to meet the special demands of a situation
  • rocky mountain sheep — bighorn.
  • sarcastic fringehead — any fish of the genus Neoclinus, characterized by a row of fleshy processes on the head, as N. blanchardi (sarcastic fringehead) of California coastal waters.
  • satellite chromosome — a type of densely staining chromosome of uncertain biological function, found in many plant and animal species.
  • saxe-weimar-eisenach — a former grand duchy in Thuringia in central Germany.
  • scatter site housing — public housing, especially for low-income families, built throughout an urban area rather than being concentrated in a single neighborhood.
  • schizoid personality — sb with identity disorder
  • schrodinger equation — the wave equation of nonrelativistic quantum mechanics. Also called Schrödinger wave equation. Compare wave equation (def 2).
  • schwarzschild radius — the radius at which a gravitationally collapsing celestial body becomes a black hole.
  • schwarzschild sphere — the sphere which surrounds a non-rotating uncharged black hole, from within which no information can escape because of gravitational forces
  • season ticket holder — a person who has a season ticket
  • semiautobiographical — pertaining to or being a fictionalized account of an author's own life.
  • sex change operation — a surgical operation designed to change a person's physical sexual characteristics to those of the opposite sex
  • short back and sides — If a man has a short back and sides, his hair is cut very short at the back and sides with slightly thicker, longer hair on the top of the head.
  • silicon tetrahydride — silane (def 1).
  • south american plate — a major tectonic division of the earth's crust, comprising the continent of South America and several ocean basins and bounded on the north by the Caribbean Plate, on the east by the Mid-Atlantic Ridge, on the west by a submarine trench that borders the western coast of the continent, and on the south by the Antarctic Plate.
  • southern oscillation — a low-latitude fluctuation of atmospheric pressure closely linked with El Niño events, specifically the periods of El Niño warming and La Niña cooling.
  • spanish west african — of or relating to the former Spanish overseas territory of Spanish West Africa (now the overseas provinces of Ifni and Spanish Sahara) or its inhabitants
  • spanish-american war — the war between the U.S. and Spain in 1898.
  • special relationship — the exceptionally close political, diplomatic, cultural and historical relations between the United States and the United Kingdom
  • spherical aberration — variation in focal length of a lens or mirror from center to edge, due to its spherical shape.
  • spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.
  • spiral of archimedes — a curve that is the locus of a point that moves outward with uniform speed along a vector, beginning at the origin, while the vector rotates about the origin with uniform angular velocity. Equation (in polar coordinates): r = aθ.
  • splice the mainbrace — to issue and partake of an extra allocation of alcoholic spirits
  • stallman, richard m. — Richard Stallman
  • stare sb in the face — If a situation or the answer to a problem is staring you in the face, it is very obvious, although you may not be immediately aware of it.
  • step into the breach — If you step into the breach, you do a job or task which someone else was supposed to do or has done in the past, because they are suddenly unable to do it.
  • stochastic terrorism — the public demonization of a person or group resulting in the incitement of a violent act, which is statistically probable but whose specifics cannot be predicted: The lone-wolf attack was apparently influenced by the rhetoric of stochastic terrorism.
  • stoichiometric ratio — The stoichiometric ratio is the exact ratio between air and flammable gas or vapor at which complete combustion takes place.
  • straight-cut tobacco — tobacco that is cut in such a way that it will lie flat.
  • switchboard operator — a person who operates an installation in a telephone exchange, office, hotel, etc, at which the interconnection of telephone lines is manually controlled
  • synchronized skating — the art or sport of teams of up to twenty skaters holding onto each other and moving in patterns in time to music
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