18-letter words containing n, o, c, e
- psychotechnologist — a specialist in psychotechnology
- public convenience — a rest room, especially at a large public place, as at a railroad station.
- public examination — an examination, such as a GCSE exam, that is set by a central examining board
- puerto rico trench — a depression in the ocean floor, N of Puerto Rico: includes deepest part of Atlantic Ocean, 28,374 feet (8648 meters).
- pull one's punches — to restrain the force of one's criticisms or actions
- pulmonic airstream — a current of lung air set in motion by the respiratory muscles in the production of speech.
- purchasing officer — the member of staff in an organization who is responsible for buying goods or products
- puss in the corner — a parlor game for children in which one player in the middle of a room tries to occupy any of the positions along the walls that become vacant as other players dash across to exchange places at a signal.
- put a bold face on — to seem bold or confident about
- put the mockers on — stop, thwart
- quadratic equation — an equation containing a single variable of degree 2. Its general form is ax 2 + bx + c = 0, where x is the variable and a, b, and c are constants (a ≠ 0).
- quality controller — a person responsible for checking that the goods or services produced by an organization are of an acceptable standard
- quite the contrary — not at all, the very opposite
- rabbit-proof fence — a fence through which rabbits are unable to pass
- racial segregation — social policy: separation of races
- 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.
- radical expression — an expression in which radical signs appear.
- radio range beacon — a radio transmitter that utilizes two or more directional antennas and transmits signals differing with direction, permitting a flier receiving a signal to determine his or her approximate bearing from the transmitter without a radio compass.
- radioactive dating — any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
- radiometric dating — any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
- raffinate recovery — Raffinate recovery is the use of a substance which is left after a process is complete and the desired substances have been removed.
- raman spectroscopy — a form of spectroscopy which uses the Raman effect for studying molecules
- reach for the moon — to desire or attempt something unattainable or difficult to obtain
- reaction formation — a behavioral tendency developed in direct opposition to a repressed impulse.
- reactive component — the component in an alternating-current circuit that does not contribute power because it is 90° out of phase with the voltage or current.
- 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
- recharacterization — portrayal; description: the actor's characterization of a politician.
- reciprocating pump — A reciprocating pump is a pump which uses a backward and forward movement to move a fluid.
- reconnaissance car — a specially equipped and armed car used for making military reconnaissance.
- recovery operation — the process of locating and retrieving bodies, esp following an explosion or natural disaster
- recruiting officer — a person whose job is to recruit staff, esp on behalf of the military
- 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
- 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
- reference counting — (programming) A garbage collection technique where each memory cell contains a count of the number of other cells which point to it. If this count reaches zero the cell is freed and its pointers to other cells are followed to decrement their counts, and so on recursively. This technique cannot cope with circular data structures. Cells in such structures refer (indirectly) to themselves and so will never have a zero reference count. This means they would never be reclaimed, even when there are no references from outside the structure.
- 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
- reinforced plastic — plastic with fibrous matter, such as carbon fibre, embedded in it to confer additional strength
- repeat performance — sth done again
- report an accident — If you report an accident, you inform an insurer or the police or other authorities that an accident has occurred.
- reprocessing plant — a plant where materials are treated in order to make them reusable
- reproduction proof — repro proof.
- rescind a contract — If an insurer rescinds an insurance contract, it terminates it because facts have been concealed or misrepresented by the proposer.
- residential school — (in Canada) a boarding school maintained by the Canadian government for Indian and Inuit children from sparsely populated settlements
- restoration comedy — English comedy of the period of the Restoration, stressing manners and social satire.
- 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.
- 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
- revolution counter — a device for counting or recording the number of revolutions made by a rotating shaft, as of a motor or engine.
- rock cornish (hen) — Cornish (sense 3) Cornish (sense 3b)