18-letter words containing s, t, e, r, i
- radiation pressure — the pressure exerted on a surface by electromagnetic radiation or by sound waves.
- radiation sickness — sickness caused by irradiation with x-rays or other nuclear radiation as a result of therapeutic treatment, accidental exposure, or a nuclear bomb explosion and characterized by nausea, vomiting, headache, cramps, diarrhea, loss of hair and teeth, destruction of white blood cells, and prolonged hemorrhage.
- radioactive series — a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced.
- range of stability — the angle to the perpendicular through which a vessel may be heeled without losing the ability to right itself.
- rape crisis centre — a place that provides support to people who have been victims of rape or other kinds of sexual abuse
- real-estate office — the place where a real-estate agent works
- 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.
- recess appointment — a person appointed to an office by the President of the United States without approval from the Senate because the Senate is in recess
- recursive function — a function defined in terms of the repeated application of a number of simpler functions to their own values, by specifying a base clause and a recursion formula
- red-light district — an area or district in a city in which many houses of prostitution are located.
- reduction division — the first division of meiosis in which the number of chromosomes is reduced to half the original number.
- 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
- regional enteritis — Crohn's disease.
- registered charity — official aid organization
- registered company — a company which has officially registered its business
- registration plate — a plate mounted on the front and back of a motor vehicle bearing the registration number
- regression testing — (programming) Part of the test phase of software development where, as new modules are integrated into the system and the added functionality is tested, previously tested functionality is re-tested to assure that no new module has corrupted the system.
- regular tertiaries — of the third order, rank, stage, formation, etc.; third.
- reinforced plastic — plastic with fibrous matter, such as carbon fibre, embedded in it to confer additional strength
- reinsurance treaty — A reinsurance treaty is a contract that defines the terms of reinsurance business.
- 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.
- 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.
- 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.
- 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.
- restriction enzyme — any of a group of enzymes that catalyze the cleavage of DNA molecules at specific sites: used for gene splicing in recombinant DNA technology and for chromosome mapping.
- restrictive clause — a relative clause that identifies the antecedent and that is usually not set off by commas in English. In The year that just ended was bad for crops, the clause that just ended is a restrictive clause.
- 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
- retirement pension — income: no longer at work
- retrograde amnesia — a memory disorder characterized by an inability to remember events or experiences that occurred before a significant point in time.
- 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.
- rolled-steel joist — a steel beam, esp one with a cross section in the form of a letter H or I