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18-letter words containing i, s, n, a

  • self-tapping screw — a screw designed to tap its corresponding female thread as it is driven.
  • self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • semi-microanalysis — any analytical method in which the weight of the sample is between 10 and 100 milligrams.
  • semicircular canal — any of the three curved tubular canals in the labyrinth of the ear, associated with the sense of equilibrium.
  • senior aircraftman — a rank in the Royal Air Force comparable to that of a private in the army, though not the lowest rank in the Royal Air Force
  • separation anxiety — the normal fear and apprehension expressed by infants when removed from their mothers or approached by strangers.
  • service department — a repair shop
  • sesto san giovanni — a city in Lombardy, N Italy: a suburb of Milan.
  • sex discrimination — the practice of treating male and female people unequally
  • sexual intercourse — genital contact, especially the insertion of the penis into the vagina followed by orgasm; coitus; copulation.
  • sexual orientation — one's natural preference in sexual partners; predilection for homosexuality, heterosexuality, or bisexuality.
  • shape-note singing — a traditional style of a capella singing using shape-note notation.
  • sharp-shinned hawk — a North American hawk, Accipiter striatus, having extremely slender legs, a bluish-gray back, and a white, rusty-barred breast.
  • shipping container — a large, strong container, usually of metal, used to store goods in during shipment
  • shunting operation — an operation in which rail coaches are manoeuvred
  • sickle cell anemia — a chronic hereditary blood disease, occurring primarily among Africans or persons of African descent, in which abnormal hemoglobin causes red blood cells to become sickle-shaped and nonfunctional, characterized by enlarged spleen, chronic anemia, lethargy, weakness, joint pain, and blood clot formation.
  • sickle-cell anemia — Sickle-cell anemia is an inherited illness in which the red blood cells become curved, causing a number of health problems.
  • sickness insurance — a type of insurance which pays out if you become ill
  • sierra blanca peak — a mountain in S New Mexico: highest peak in the Sacramento Mountains. 11,997 feet (3651 meters).
  • sign of the zodiac — one of the twelve constellations along the path of the ecliptic.
  • significance level — (in the statistical test of a hypothesis) the maximum probability of a Type I error for all distributions consistent with the null hypothesis.
  • significant symbol — a verbal or nonverbal gesture, as a word or smile, that has acquired a conventionalized meaning.
  • sildenafil citrate — a white crystalline powder, C 22 H 30 N 6 O 4 S, that temporarily normalizes erectile function of the penis by blocking an enzyme known to inhibit the production of a chemical that causes erections: used in the form of a pill to treat impotence.
  • simone de beauvoir — Simone [see-mawn] /siˈmɔn/ (Show IPA), (Lucie Ernestine Marie Bertrand) 1908–86, French playwright, novelist, and essayist.
  • simple enumeration — a procedure for arriving at empirical generalizations by haphazard accumulation of positive instances.
  • sinclair radionics — Sinclair Research
  • sindbad the sailor — (in The Arabian Nights' Entertainments), a wealthy citizen of Baghdad who relates the adventures of his seven wonderful voyages.
  • sit on one's hands — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
  • ski-mountaineering — a combination of the sports of skiing and mountaineering, for example by climbing up a mountain then skiing down it
  • skin friction drag — aerodynamic resistance or drag due to the contact of moving air with the surface of an airplane, a glider, etc.
  • skinny-rib sweater — a tight-fitting ribbed woollen jumper or pullover
  • sleeping policeman — a bump built across roads, esp in housing estates, to deter motorists from speeding
  • slobodan milosevic — Slobodan [sloh-buh-dain] /ˈsloʊ bəˌdɛən/ (Show IPA), 1941–2006, Yugoslav and Serbian politician: president of Serbia 1989–97, president of the Federal Republic of Yugoslavia 1997–2000, accused of war crimes 2001.
  • slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
  • small outline dimm — (storage)   (SO-DIMM) A smaller kind of DIMM with 72 pins (supporting 32-bit transfers) or 144 pins (64-bit transfers). Regular DIMMs have 168 pins and support 64-bit transfers. Being roughly half the size of the regular DIMM, SO-DIMMs are often used in notebook computers.
  • snake in the grass — a treacherous person, especially one who feigns friendship.
  • social bookmarking — the practice of saving bookmarked Web pages to a public website as a way to share the links with other Internet users: Social bookmarking is a tool that allows you to add tags and comments to your bookmarks.
  • social engineering — the application of the findings of social science to the solution of actual social problems.
  • social environment — the environment developed by humans as contrasted with the natural environment; society as a whole, especially in its relation to the individual.
  • societal marketing — marketing that takes into account society's long-term welfare
  • sociotechnological — of, relating to, or signifying the combination or interaction of social and technological factors.
  • sodium bicarbonate — a white, crystalline, water-soluble solid, in powder or granules, NaHCO 3 , usually prepared by the reaction of soda ash with carbon dioxide or obtained from the intermediate product of the Solvay process by purification: used chiefly in the manufacture of sodium salts, baking powder, and beverages, as a laboratory reagent, as a fire extinguisher, and in medicine as an antacid.
  • sodium thiocyanate — a white powder or colorless, deliquescent crystals, NaSCN, used chiefly in organic synthesis and in medicine in the treatment of hypertension.
  • soft touch sealing — Soft touch sealing is a copolymer seal for a tank, with characteristics designed for softness, used instead of a metal seal to help avoid fire when sparks are generated.
  • solemn (high) mass — a highly ceremonial Mass with parts of the text sung by the celebrant, with a deacon and subdeacon assisting at the ceremonies, and with choir singing and organ music
  • solid-fuel heating — heating that uses solid fuel, such as coal or coke
  • solitary sandpiper — a North American sandpiper, Tringa solitaria, of inland wetlands, having a brownish-gray, white-spotted back and whitish underparts.
  • solomon rabinowitz — Solomon, Aleichem, Sholom.
  • solvent extraction — Solvent extraction is the separation of a particular substance from a mixture by dissolving that substance in a solvent that will dissolve it, but which will not dissolve any other substance in the mixture.
  • something to spare — a surplus of something
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