19-letter words containing a, d, s, u
- olive-backed thrush — Swainson's thrush.
- optical 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)
- ordnance survey map — An Ordnance Survey map is a detailed map produced by the British or Irish government map-making organization.
- orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
- peroxysulfuric acid — persulfuric acid (def 1).
- pleased to meet you — greeting
- police headquarters — building where police are stationed
- potassium hydroxide — a white, deliquescent, water-soluble solid, KOH, usually in the form of lumps, sticks, or pellets, that upon solution in water generates heat: used chiefly in the manufacture of soap, as a laboratory reagent, and as a caustic.
- profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
- progressive judaism — Reform Judaism.
- pseudo-aristocratic — of or relating to government by an aristocracy.
- pseudo-biographical — of or relating to a person's life: He's gathering biographical data for his book on Milton.
- pseudo-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
- pseudo-experimental — pertaining to, derived from, or founded on experiment: an experimental science.
- pseudo-intellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
- pseudo-intransitive — denoting an occurrence of a normally transitive verb in which a direct object is not explicitly stated or forms the subject of the sentence, as in Margaret is cooking or these apples cook well
- pseudo-professional — following an occupation as a means of livelihood or for gain: a professional builder.
- pseudohermaphrodite — an individual having internal reproductive organs of one sex and external sexual characteristics resembling those of the other sex or being ambiguous in nature. Compare hermaphrodite (def 1).
- pseudopsychological — of or relating to psychology.
- pseudorandom number — (programming) One of a sequence of numbers generated by some algorithm so as to have an even distribution over some range of values and minimal correlation between successive values. Pseudorandom numbers are used in simulation and encryption. They are pseudorandom not random because the sequence eventually repeats exactly and is entirely determined by the initial conditions. One of the simplest algorithms is x[i+1] = (a * x[i] + c) mod m but this repeats after at most m numbers and successive numbers are closely related. Better algorithms generally use more previous numbers to calculate the next number.
- punch and judy show — A Punch and Judy show is a puppet show for children, often performed at fairs or at the seaside. Punch and Judy, the two main characters, are always fighting.
- punch-and-judy show — a puppet show having a conventional plot consisting chiefly of slapstick humor and the tragicomic misadventures of the grotesque, hook-nosed, humpback buffoon Punch and his wife Judy.
- queensland lungfish — a lungfish, Neoceratodus forsteri, reaching a length of six feet: occurs in Queensland rivers but introduced elsewhere
- radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
- red-shouldered hawk — a North American hawk, Buteo lineatus, having rufous shoulders.
- regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
- reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
- religious education — religion as school subject
- reserved occupation — in time of war, an occupation from which one will not be called up for military service
- residence insurance — Residence insurance is insurance coverage against damage to a building in which you live.
- resplendent quetzal — See under quetzal (def 1).
- saddharma-pundarika — a Mahayana sutra, forming with its references to Amida and the Bodhisattvas the basis for the doctrine that there is something of Buddha in everyone, so that salvation is universally available: a central text of Mahayana Buddhism.
- saint vitus's dance — chorea (def 2).
- 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.
- san juan de la cruz — San Juan de la [sahn hwahn de lah] /sɑn ʰwɑn dɛ lɑ/ (Show IPA), John of the Cross, Saint.
- sao paulo de luanda — Luanda.
- scale down (or up) — to reduce (or increase), often according to a fixed ratio or proportion
- school of the squad — an institution where instruction is given, especially to persons under college age: The children are at school.
- screen actors guild — a labor union for motion-picture performers, founded in 1933. Abbreviation: SAG.
- seasonal adjustment — an adjustment that removes the seasonal component of statistics
- 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.
- semiconductor laser — a laser in which a semiconductor is the light-emitting source, used in many medical procedures.
- sexual reproduction — reproduction involving the union of gametes.
- 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.
- shucking and jiving — misleading or deceptive talk or behavior, as to give a false impression.
- sidereal hour angle — the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
- sir wilfrid laurier — Sir Wilfrid [wil-frid;; French weel-freed] /ˈwɪl frɪd;; French wilˈfrid/ (Show IPA), 1841–1919, Canadian statesman: prime minister 1896–1911.