18-letter words containing s, o, d, y
- neuropsychodynamic — Of or pertaining to neuropsychodynamics.
- normally aspirated — A normally aspirated or naturally aspirated engine breathes air at atmospheric pressure.
- old curiosity shop — a novel (1840–41) by Dickens.
- organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
- orthopedic surgery — corrective operation on bones or joints
- parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
- payload specialist — an astronaut trained to handle highly complex or classified equipment carried aboard a space shuttle and to conduct experiments in space.
- people's democracy — (in Communist ideology) a country or form of government in transition from bourgeois democracy to socialism. In this stage there is more than one class, the largest being the proletariat, led by the Communist Party, which is therefore the dominant power
- personal bodyguard — a person employed to protect a particular person
- phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
- physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
- play cat and mouse — Also called cat and rat. a children's game in which players in a circle keep a player from moving into or out of the circle and permit a second player to move into or out of the circle to escape the pursuing first player.
- play second fiddle — be considered less important
- population density — ratio: inhabitants to area
- positively charged — having a positive charge
- postviral syndrome — debilitating condition occurring as a sequel to viral illness
- productivity bonus — an extra payment made to workers for being more productive or yielding more favourable results than normal
- programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
- protective custody — detention of a person by the police solely as protection against a possible attack or reprisal by someone.
- pseudo-symptomatic — pertaining to a symptom or symptoms.
- pyrosulphuric acid — a fuming liquid acid made by adding sulphur trioxide to concentrated sulphuric acid. Formula: H2S2O7
- quevedo y villegas — Francisco Gómez de. 1580–1645, Spanish poet and writer, noted for his satires and the picaresque novel La historia de la vida del Buscón (1626)
- radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
- reduction strategy — (theory) An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
- reflection density — a measure of the extent to which a surface reflects light or other electromagnetic radiation, equal to the logarithm to base ten of the reciprocal of the reflectance
- registered company — a company which has officially registered its business
- restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
- rheims-douay bible — Douay Bible.
- ride a hobby horse — an activity or interest pursued for pleasure or relaxation and not as a main occupation: Her hobbies include stamp-collecting and woodcarving.
- safety-deposit box — a lockable metal box or drawer, especially in a bank vault, used for safely storing valuable papers, jewelry, etc.
- saint george's day — April 23, celebrated in parts of the British Commonwealth in honor of the patron saint of Britain and especially in New Zealand as a bank holiday.
- say/kiss goodnight — If you say goodnight to someone or kiss them goodnight, you say something such as 'Goodnight' to them or kiss them before one of you goes home or goes to sleep.
- science dictionary — a specialized dictionary covering terms in the life, earth, and physical sciences, such as the online Science Dictionary on Dictionary.com. A science dictionary includes many technical terms with precise, specialized meanings—terms not normally found in general dictionaries—making it an invaluable resource for students and professionals in scientific fields.
- search-and-destroy — designed to find and destroy by bombing etc
- second only to sth — If you say that something is second only to something else, you mean that only that thing is better or greater than it.
- secondary consumer — (in the food chain) a carnivore that feeds only upon herbivores.
- secondary deviance — deviant behavior that results from being publicly labeled as deviant and treated as an outsider.
- secondary diagonal — a diagonal line or plane.
- secondary emission — the emission of electrons (secondary electrons) from a material that is bombarded with electrons or ions.
- secondary industry — manufacturing, services, etc.
- secondary offering — the sale of a large block of outstanding stock off the floor of an exchange, usually by a major stockholder.
- secondary recovery — extraction of oil or natural gas under artificially induced pressure after the natural flow has ceased.
- secondary syphilis — the second stage of syphilis, characterized by eruptions of the skin and mucous membrane.
- self-contradictory — an act or instance of contradicting oneself or itself.
- september holidays — a period of time in September when people do not have to go to school, college or work
- shaggy dog (story) — a long, rambling joke, typically involving ludicrously unreal or irrational behavior and usually having an irrelevant conclusion
- shop till you drop — If you shop till you drop, you do a large amount of shopping.
- society of friends — a Christian denomination, founded in England c. 1650 by George Fox, that has no formal creed, liturgy, or priesthood and rejects violence in human relations, esp. warfare
- sodium hyposulfite — sodium thiosulfate.
- sodium polysulfide — a yellow-brown, water-soluble, granular powder, Na 2 S n , used chiefly in the manufacture of sulfur dyes, insecticides, and synthetic rubber.