18-letter words containing s, t, y, r, a
- postviral syndrome — debilitating condition occurring as a sequel to viral illness
- potassium myronate — sinigrin.
- preparatory school — a private or parochial secondary school, especially one boarding its students and providing a college-preparatory education.
- presentation layer — (networking) The second highest layer (layer 6) in the OSI seven layer model. Performs functions such as text compression, code or format conversion to try to smooth out differences between hosts. Allows incompatible processes in the application layer to communicate via the session layer. Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO 8822).
- processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
- programme of study — the prescribed syllabus that pupils must be taught at each key stage in the National Curriculum
- property insurance — insurance coverage for land and housing
- proprietary rights — rights of ownership
- psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
- psychotherapeutics — psychotherapy.
- pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
- quality of service — (communications, networking) (QoS) The performance properties of a network service, possibly including throughput, transit delay, priority. Some protocols allow packets or streams to include QoS requirements.
- quantity surveying — the action or profession of a person who estimates the cost of the materials and labour necessary for a construction job
- 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.
- raman spectroscopy — a form of spectroscopy which uses the Raman effect for studying molecules
- range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
- rear its ugly head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
- 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
- registered charity — official aid organization
- registered company — a company which has officially registered its business
- reinsurance treaty — A reinsurance treaty is a contract that defines the terms of reinsurance business.
- repayment schedule — a document detailing the specific terms of a borrower's loan, such as monthly payment, interest rate, due dates etc
- reporters' gallery — an area in parliament reserved for journalists and reporters
- respiratory arrest — cessation of breathing
- respiratory system — the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs.
- restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
- revolutionary wars — American Revolution.
- rotary clothesline — an apparatus of radiating spokes that support lines on which clothes are hung to dry
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- 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.
- saskatchewan party — (in Canada) a Saskatchewan political party formed by former members of the provincial Progressive Conservative and Liberal Parties
- schwarz inequality — Also called Cauchy's inequality. the theorem that the inner product of two vectors is less than or equal to the product of the magnitudes of the vectors.
- 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.
- scottish secretary — the Secretary of State for Scotland, head of the Scotland Office, a UK government department with responsibility for some Scottish affairs
- search-and-destroy — designed to find and destroy by bombing etc
- secondary industry — manufacturing, services, etc.
- secretarial agency — a recruiting business which deals with jobs for secretaries
- secretary of state — the head and chief administrator of the U.S. Department of State. Compare foreign minister.
- securities analyst — an expert who advises on investment in securities such as stocks, shares and bonds
- security agreement — business: contract
- security clearance — access to top secret information
- self-contradictory — an act or instance of contradicting oneself or itself.
- self-deprecatingly — in a self-deprecating manner
- separation anxiety — the normal fear and apprehension expressed by infants when removed from their mothers or approached by strangers.
- 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
- shugart technology — Seagate Technology
- skinny-rib sweater — a tight-fitting ribbed woollen jumper or pullover
- 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
- smart battery data — (hardware, protocol) (SBD) A method to monitor a rechargeable battery pack, initiated by Duracell and Intel. An special IC in the battery pack monitors the battery and reports information to the SMBus. This information might include: type, model number, manufacturer, characteristics, discharge rate, predicted remaining capacity, almost-discharged alarm so that the PC can shut down gracefully; temperature and voltage to provide safe fast-charging.