15-letter words containing a, e, r, o, s, i
- shot in the arm — a discharge of a firearm, bow, etc.
- sidereal period — the period of revolution of a body about another with respect to one or more distant stars
- silent majority — the U.S. citizens who supported President Nixon's policies but who were not politically vocal, outspoken, or active: considered by him to constitute a majority.
- silicon carbide — a very hard, insoluble, crystalline compound, SiC, used as an abrasive and as an electrical resistor in objects exposed to high temperatures.
- silver quandong — an Australian tree, Elaeocarpus grandis: family Elaeocarpaceae
- simple fraction — a ratio of two integers.
- simple majority — less than half of the total votes cast but more than the minimum required to win, as when there are more than two candidates or choices.
- singapore sling — a cocktail of gin, cherry brandy, sugar, and water.
- sinistrodextral — moving or extending from the left to the right.
- sink a borehole — To sink a borehole means to drill a deep hole in the ground.
- sinoatrial node — a small mass of tissue in the right atrium functioning as pacemaker of the heart by giving rise to the electric impulses that initiate heart contractions.
- sinorespiratory — of, relating to, or affecting the paranasal sinuses and the respiratory tract.
- slavonian grebe — a N Eurasian or N American grebe with reddish underside and a black and gold crest; Podiceps auritus
- sled cultivator — go-devil (def 5).
- smoking-related — (of a disease, illness, etc) caused by smoking tobacco, etc
- social democrat — a person who advocates a gradual transition to socialism or a modified form of socialism by and under democratic political processes.
- social heritage — the entire inherited pattern of cultural activity present in a society.
- social register — a directory or list of people prominent in the fashionable society of a given area
- social security — (usually initial capital letters) a program of old-age, unemployment, health, disability, and survivors insurance maintained by the U.S. federal government through compulsory payments by specific employer and employee groups.
- social services — organized welfare efforts carried on under professional auspices by trained personnel.
- socratic method — the use of questions, as employed by Socrates, to develop a latent idea, as in the mind of a pupil, or to elicit admissions, as from an opponent, tending to establish a proposition.
- sodium arsenite — a white or grayish-white, water-soluble, poisonous powder, NaAsO 2 , used chiefly in arsenical soaps for hides, as an insecticide, and as a weed-killer.
- sodium chlorate — a colorless, water-soluble solid, NaClO 3 , cool and salty to the taste, used chiefly in the manufacture of explosives and matches, as a textile mordant, and as an oxidizing and bleaching agent.
- sodium citrates — the sodium salts of citric acid (monosodium citrate, disodium citrate, trisodium citrate)
- sodium stearate — Sodium stearate is a salt of stearic acid used as a surfactant (= a substance that reduces the surface tension of a liquid and allows it to foam) in order to aid the solubility of hydrophobic substances in oral medicines.
- soldier's heart — cardiac neurosis.
- soldier's medal — a medal awarded to any member of the Army of the United States, or of any military organization serving with it, who distinguishes himself or herself by heroism not involving conflict with an enemy.
- somatic therapy — any of a group of treatments presumed to act on biological factors leading to mental illness.
- somerset island — an island in the Arctic Ocean in Nunavut, Canada, NW of Baffin Island. 9594 sq. mi. (24,848 sq. km).
- source material — original, authoritative, or basic materials utilized in research, as diaries or manuscripts.
- southern paiute — See under Paiute (def 2).
- spanish trefoil — alfalfa.
- spectrochemical — of, relating to, or utilizing the techniques of spectrochemistry.
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- spermatoblastic — relating to a spermatoblast
- spermatogenesis — the origin and development of spermatozoa.
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spiral notebook — a notebook held together by a coil of wire passed through small holes punched at the back edge of the covers and individual pages
- spirochaetaemia — the presence of spirochaetes in the blood
- sporting chance — an even or fair opportunity for a favorable outcome in an enterprise, as winning in a game of chance or in any kind of contest: They gave the less experienced players a sporting chance by handicapping the experts.
- stage direction — an instruction written into the script of a play, indicating stage actions, movements of performers, or production requirements.
- stalactite work — (in Islamic architecture) intricate decorative corbeling in the form of brackets, squinches, and portions of pointed vaults.
- stamford bridge — a village in N England, east of York: site of a battle (1066) in which King Harold of England defeated his brother Tostig and King Harald Hardrada of Norway, three weeks before the Battle of Hastings
- standing orders — Military. (formerly) a general order always in force in a command and establishing uniform procedures for it; standard operating procedure.
- star connection — a connection used in a polyphase electrical device or system of devices in which the windings each have one end connected to a common junction, the star point, and the other end to a separate terminal
- starfish flower — carrion flower (def 2).
- start something — to cause a disturbance or trouble
- starvation diet — insufficient food to stay alive
- station officer — a person who is in charge of a fire station