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19-letter words containing a, c, t, u

  • quantum electronics — the application of quantum mechanics and quantum optics to the study and design of electronic devices
  • quartermaster corps — the branch of the U.S. Army responsible for supplying food, clothing, fuel, and equipment and for the operation of commissaries, laundries, etc.
  • quick on the uptake — You say that someone is quick on the uptake when they understand things quickly. You say that someone is slow on the uptake when they have difficulty understanding simple or obvious things.
  • quick-change artist — a person adept at changing from one thing to another, as an entertainer who changes costumes quickly during a performance.
  • radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
  • radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
  • radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
  • rap on the knuckles — a mild reprimand or light sentence
  • reactor temperature — The reactor temperature is the temperature at various stages in a reactor in an FCC unit.
  • rebus sic stantibus — (of the duration of the binding force treaty) for as long as the relevant facts and circumstances remain basically the same.
  • reciprocity failure — a failure of the two exposure variables, light intensity and exposure time, to behave in a reciprocal fashion at very high or very low values
  • reconceptualization — to form into a concept; make a concept of.
  • recurrence relation — (mathematics)   An equation that defines each element of a sequence in terms of one or more earlier elements. E.g. The Fibonacci sequence, X[1] = 1 X[2] = 1 X[n] = X[n-1] + X[n-2] Some recurrence relations can be converted to "closed form" where X[n] is defined purely in terms of n, without reference to earlier elements.
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • relational calculus — (database)   An operational methodolgy, founded on predicate calculus, dealing with descripitive expressions that are equivalent to the operations of relational algebra. Codd's reduction algorithm can convert from relational calculus to relational algebra. Two forms of the relational calculus exist: the tuple calculus and the domain calculus.
  • religious education — religion as school subject
  • republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • restorative justice — a theory and method in criminal justice in which it is arranged that the victim and the community receive restitution from the offender.
  • reticular formation — a network of neurons in the brainstem involved in consciousness, regulation of breathing, the transmission of sensory stimuli to higher brain centers, and the constantly shifting muscular activity that supports the body against gravity.
  • reticulated tracery — tracery consisting in large part of a netlike arrangement of repeated geometrical figures.
  • reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
  • revenue enhancement — a new tax or a tax increase.
  • 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.
  • ring up the curtain — to begin a theatrical performance
  • rocky mountain goat — a long-haired, white, antelopelike wild goat, Oreamnos americanus, of mountainous regions of western North America, having short, black horns.
  • sacramento sturgeon — white sturgeon.
  • saint vitus's dance — chorea (def 2).
  • san juan capistrano — a city in SW California: site of old Spanish mission; known for annual return of swallows, said to occur on March 19.
  • saturation coverage — news coverage (of an event, etc) that is very thorough in order not to miss any details
  • scattersite housing — public housing, especially for low-income families, built throughout an urban area rather than being concentrated in a single neighborhood.
  • school of the squad — an institution where instruction is given, especially to persons under college age: The children are at school.
  • scratch the surface — examine superficially
  • screen actors guild — a labor union for motion-picture performers, founded in 1933. Abbreviation: SAG.
  • secondary education — education at high-school level
  • secondary qualities — one of the qualities attributed by the mind to an object perceived, such as color, temperature, or taste.
  • secondary structure — the arrangement of a polypeptide into a regular alpha helix, beta structure, or random coil configuration by the formation of intramolecular hydrogen bonds along the length of the chain.
  • 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)
  • self-congratulating — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
  • self-congratulation — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
  • self-congratulatory — the expression or feeling of uncritical satisfaction with oneself or one's own accomplishment, good fortune, etc.; complacency.
  • semibituminous coal — a coal intermediate between bituminous and anthracite coal in hardness, yielding the maximum heat of any ordinary steam coal.
  • semiconductor laser — a laser in which a semiconductor is the light-emitting source, used in many medical procedures.
  • senatorial courtesy — the practice in the U.S. Senate of confirming only those presidential appointees approved by both senators from the state of the appointee, or by the senior senator of the president's party.
  • sentential calculus — the branch of symbolic logic dealing with the logical relationships between statements insofar as they can be analyzed into conjunctions, disjunctions, and negations of more elementary statements.
  • sentential function — an expression that contains one or more variables and becomes meaningful when suitable constant terms are substituted for them.
  • sequential scanning — a system of scanning a television picture along the lines in numerical sequence
  • sexual inter-course — genital contact, especially the insertion of the penis into the vagina followed by orgasm; coitus; copulation.
  • sexual reproduction — reproduction involving the union of gametes.
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