18-letter words containing e, r, i, t, a, n
- relational algebra — (database, theory) A family of algebra with a well-founded semantics used for modelling the data stored in relational databases, and defining queries on it. The main operations of the relational algebra are the set operations (such as union, intersection, and cartesian product), selection (keeping only some lines of a table) and the projection (keeping only some columns). The relational data model describes how the data is structured.
- relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
- relative minor key — a minor key that has the same key signature as a major key, but a different tonic
- remains to be seen — If you say that it remains to be seen whether something will happen, you mean that nobody knows whether it will happen.
- remanent magnetism — magnetization in minerals induced by a former magnetic field and persisting after the field changes.
- renter's insurance — Renter's insurance is insurance for renters to insure their property against loss.
- replacement engine — an engine used to replace or substitute an older or broken engine (in a vehicle, etc)
- report an accident — If you report an accident, you inform an insurer or the police or other authorities that an accident has occurred.
- representativeness — a person or thing that represents another or others.
- reprocessing plant — a plant where materials are treated in order to make them reusable
- rescind a contract — If an insurer rescinds an insurance contract, it terminates it because facts have been concealed or misrepresented by the proposer.
- research assistant — a graduate who is employed on a temporary or part-time basis to assist the university with academic research
- research scientist — someone who conducts scientific research or investigation, in order to discover new things, etc
- research-intensive — focusing financial and other resources on research and development as opposed to capital and labor; noting or pertaining to a high ratio of expenditure on research in relation to the value of net output.
- residential school — (in Canada) a boarding school maintained by the Canadian government for Indian and Inuit children from sparsely populated settlements
- residual magnetism — remanence.
- resistance fighter — someone who fights (for freedom, etc) against an invader in an occupied country, or against their government, etc, often secretly or illegally
- resistance plasmid — any of a group of bacterial plasmids carrying genetic information that provide resistance to antibiotic drugs: some resistance plasmids are able to transfer themselves, and hence resistance, during conjugation
- resistance welding — welding utilizing pressure and heat that is generated in the pieces to be welded by resistance to an electric current.
- restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
- restraining circle — any of three circles on the floor of a basketball court used for jump balls: other players must remain outside the circle during a jump ball
- restraint of trade — action tending to interrupt the free flow of goods and services, as by price fixing and other practices that have the effect of reducing competition.
- resurrection plant — a desert plant, Selaginella lepidophylla, occurring from Texas to South America, having stems that curl inward when dry.
- resuscitation room — an intensive care unit
- retail price index — The retail price index is a list of the prices of typical goods which shows how much the cost of living changes from one month to the next.
- retrograde amnesia — a memory disorder characterized by an inability to remember events or experiences that occurred before a significant point in time.
- reverberation time — the time it takes for a sound made in a room to diminish by 60 decibels.
- revolutionary wars — American Revolution.
- rhode island white — one of a dual-purpose American breed of chickens having white feathers and a rose comb.
- risk based testing — (testing) Testing based on identification of potential risks (or "candidate risks"), which should be analysed by the project stakeholder or which might appear during the project's development.
- rolling resistance — The rolling resistance of a wheel or ball is its resistance to movement caused by friction between it and the surface it is rolling on.
- roman architecture — buildings in style of ancient Rome
- roman congregation — any of the executive departments of the Curia Romana as the administration of the Roman Catholic Church.
- rotary clothesline — an apparatus of radiating spokes that support lines on which clothes are hung to dry
- rotational latency — (storage, hardware) The time for the start of the required sector on a disk to appear underneath the read/write head. The worst case is where it has just passed the head when the request is received. For a disk drive with N heads per surface, rotating at R revolutions per minute, the average rotational latency will be L = 30/NR seconds. Rotational latency is one component of access time.
- running commentary — non-stop description of sth
- running martingale — martingale (def 2).
- russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
- russian revolution — Also called February Revolution. the uprising in Russia in March, 1917 (February Old Style), in which the Czarist government collapsed and a provisional government was established.
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- saint bernard pass — either of two passes over the Alps: the Great St Bernard Pass 2472 m (8110 ft) high, east of Mont Blanc between Italy and Switzerland, or the Little St Bernard Pass 2157 m (7077 ft) high, south of Mont Blanc between Italy and France
- saint clare assisi — 1194–1253, Italian nun: founder of the Franciscan order of nuns.
- 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.
- saint john's bread — carob (def 2).
- saint peter's fish — another name for tilapia, taken from a Bible story about Saint Peter catching a fish with a coin in its mouth
- saturated solution — A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve.
- sault sainte marie — the rapids of the St. Marys River, between NE Michigan and Ontario, Canada.
- 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.
- scissors-and-paste — designating or of a piece of writing that has been assembled from a variety of sources rather than by original research, often in a hasty or uninspired way