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18-letter words containing a, r, c, t, i

  • special relativity — the state or fact of being relative.
  • specialist teacher — a teacher with expertise in working with children with special educational needs, such as dyslexia
  • specimen signature — a signature to be compared to an original signature in order to verify someone's identity
  • spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
  • spectropolarimeter — an instrument for determining the extent to which plane-polarized light of various wavelengths is rotated by certain solutions, consisting of a combination of a spectroscope and a polarimeter.
  • spectropolariscope — an instrument combining the functions of a spectroscope with those of a polariscope.
  • sperry corporation — (company)   The company which merged with the Burroughs Corporation to form Unisys Corporation. Divisions included Sperry Univac, Sperry Flight Systems, and others. Some of these were sold off after the merger.
  • spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
  • spherical triangle — a triangle formed by arcs of great circles of a sphere.
  • st. lawrence river — a river in SE Canada, flowing NE from Lake Ontario, forming part of the boundary between New York and Ontario, and emptying into the Gulf of St. Lawrence. 760 miles (1225 km) long.
  • static electricity — a stationary electric charge built up on an insulating material.
  • stationary bicycle — an exercise bike
  • statutory sick pay — the pay an employee is legally entitled to when sick
  • stoichiometrically — of or relating to stoichiometry.
  • stokely carmichael — Hoagland Howard [hohg-luh nd] /ˈhoʊg lənd/ (Show IPA), ("Hoagy") 1899–1981, U.S. songwriter and musician.
  • strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
  • stratigraphic trap — A stratigraphic trap is a rock formation that contains hydrocarbons and is sealed by other rock formations.
  • street certificate — a certificate showing ownership of a specified number of shares of stock: endorsed by the owner and guaranteed by a broker, it may be traded without formal transfer on the books of the corporation issuing the stock.
  • strong interaction — the interaction between gluons and between gluons and quarks that is responsible for the strong force.
  • subatomic particle — physics:
  • subordinate clause — a clause that modifies the principal clause or some part of it or that serves a noun function in the principal clause, as when she arrived in the sentence I was there when she arrived or that she has arrived in the sentence I doubt that she has arrived.
  • subsistence farmer — a farmer who consumes most of the produce he grows, leaving little or nothing to be marketed
  • substitute teacher — educator: replaces sb temporarily
  • supporting actress — an actress playing a supporting role
  • swarm intelligence — the collective behaviour of a group of animals, esp social insects such as ants, bees, and termites, that are each following very basic rules
  • sweptwing aircraft — an aircraft which has wings that are swept (usually) backwards
  • sympathetic strike — sympathy strike.
  • sympathetic string — a thin wire string, as in various obsolete musical instruments, designed to vibrate sympathetically with the bowed or plucked strings to reinforce the sound.
  • take out insurance — take out insurance against something
  • teacher evaluation — the process of vetting teachers to maintain teaching standards
  • technical reserves — Technical reserves are amounts of money set aside to pay for underwriting liabilities.
  • technical sergeant — a noncommissioned officer ranking below a master sergeant and above a staff sergeant.
  • tectorial membrane — membrane in the inner ear that covers the organ of Corti
  • tender loving care — considerate and kindly care, as of someone who is ill, upset, etc
  • tertiary education — education, following secondary education at a school, at a college or university
  • tertiary structure — the way in which the helixes or beta structures of a polypeptide are folded or arranged into a three-dimensional configuration.
  • the american dream — the notion that the American social, economic, and political system makes success possible for every individual
  • the baptist church — any of various Protestant churches that believe in the baptism of believers
  • the cat's whiskers — a person or thing that is excellent or superior
  • the coast is clear — If you say that the coast is clear, you mean that there is nobody around to see you or catch you.
  • the dark continent — a term for Africa when it was relatively unexplored
  • the electric chair — an electrified chair for executing criminals
  • the electronic age — the electronic age began when electronic equipment, including computers came into use
  • the french riviera — the Mediterranean coastal region of France from Cannes eastward to Italy
  • the general public — the people in a society; people in general
  • the north atlantic — the northern part of the Atlantic Ocean, especially the waters separating North America and Europe
  • the practicalities — the real facts or details of a situation, as opposed to its theoretical aspects
  • the-cocktail-party — a play in verse (1950) by T. S. Eliot.
  • the-dark-continent — Africa: so called, especially during the 19th century, because little was known about it.
  • theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
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