15-letter words containing r, a, d, i, o, s
- solar radiation — energy radiated from the sun in the form of electromagnetic waves, including visible and ultraviolet light and infrared radiation.
- 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.
- somerset island — an island in the Arctic Ocean in Nunavut, Canada, NW of Baffin Island. 9594 sq. mi. (24,848 sq. km).
- spawning ground — a place where fish deposit their eggs for fertilization
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- stage direction — an instruction written into the script of a play, indicating stage actions, movements of performers, or production requirements.
- 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
- stamping ground — a habitual or favorite haunt.
- standardization — to bring to or make of an established standard size, weight, quality, strength, or the like: to standardize manufactured parts.
- standing orders — Military. (formerly) a general order always in force in a command and establishing uniform procedures for it; standard operating procedure.
- starvation diet — insufficient food to stay alive
- storage disease — a metabolic disorder characterized by excessive storage in certain cells of normal metabolic intermediates, as fats, iron, and carbohydrates.
- straightforward — going or directed straight ahead: a straightforward gaze.
- strait of dover — a strait between SE England and N France, linking the English Channel with the North Sea. Width: about 32 km (20 miles)
- studio portrait — a photograph of a person taken in a studio
- subsidiary coin — a coin, especially one made of silver, having a value less than that of the monetary unit.
- sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
- summer holidays — the time when children do not go to school in the summer
- superordination — Logic. the relation between a universal proposition and a particular proposition of the same quality containing the same terms in the same order.
- swiss army code — (programming, humour) Code for an application that is suffering from feature creep. Swiss Army Code does many things, but does none of them well.
- terminator seed — a seed that produces sterile plants, used in some genetically modified crops so that a new supply of seeds has to be bought every year
- the cordilleras — the complex of mountain ranges on the W side of the Americas, extending from Alaska to Cape Horn and including the Andes and the Rocky Mountains
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- tirso de molina — Luis [loo-ees] /luˈis/ (Show IPA), 1535–1600, Spanish Jesuit theologian.
- to make friends — If you make friends with someone, you begin a friendship with them. You can also say that two people make friends.
- trading profits — profits made from the buying and selling of goods and services
- trans-jordanian — of or relating to the former Trans-Jordan (now Jordan) or its inhabitants
- transfer window — the period during the year in which a football club can transfer players from other teams into their own
- trapdoor spider — any of various, often large, spiders (esp. family Ctenizidae) that dig a burrow and cover the entrance with a hinged lid like a trapdoor
- trojan asteroid — one of a number of asteroids that have the same mean motion and orbit as Jupiter, preceding or following the planet by a longitude of 60°
- ultra-modernist — very advanced in ideas, design, or techniques.
- ultrafastidious — extremely fastidious
- un-considerable — rather large or great in size, distance, extent, etc.: It cost a considerable amount. We took a considerable length of time to decide.
- unconstrainedly — in an unconfined manner
- undemonstrative — not given to open exhibition or expression of emotion, especially of affection.
- underestimation — to estimate at too low a value, rate, or the like.
- universal donor — a person with blood of group O.
- unskilled labor — work that requires practically no training or experience for its adequate or competent performance.
- victoria island — an island off the coast of N Canada, in the Arctic Ocean. 80,340 sq. mi. (208,081 sq. km).
- villeda morales — Ramón [rah-mawn] /rɑˈmɔn/ (Show IPA), 1909?–71, Honduran diplomat and statesman: president 1957–63.
- w.h. richardson — Henry Handel (Henrietta Richardson Robertson) 1870–1946, Australian novelist.
- wilderness road — a 300-mile (500-km) route from eastern Virginia through the Cumberland Gap into Kentucky, explored by Daniel Boone in 1769 and marked as a trail by him and other pioneers in 1775: a major route for early settlers moving west.
- winter holidays — a period of rest from work or studies taken in winter
- x-ray diagnosis — diagnosis by means of an X-ray
- yorkshire dales — the valleys of the rivers flowing from the Pennines in W Yorkshire: chiefly Ribblesdale, Swaledale, Nidderdale, Wharfedale, and Wensleydale; tourist area