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21-letter words containing a, t, l, o, r

  • new general catalogue — NGC.
  • new year's resolution — If you make a New Year's resolution, you make a decision at the beginning of a year to start doing something or to stop doing something.
  • nitrosylsulfuric acid — a clear, straw-colored, oily, corrosive liquid, HNO 5 S, used chiefly in the manufacture of dyes.
  • no less a person than — a person of no lower importance, rank, etc. than
  • non-maintainer upload — (operating system)   (NMU) A release of a Debian package by someone other than its usual maintainer. E.g. "The bug was fixed in a recent NMU."
  • non-repeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • nonproportional cover — Nonproportional cover is reinsurance cover such as excess of loss reinsurance where the reinsurer's liability is not calculated as a proportion of the insurance.
  • nonrestrictive clause — a relative clause that describes or supplements but is not essential in establishing the identity of the antecedent and is usually set off by commas in English. In This year, which has been dry, is bad for crops the clause which has been dry is a nonrestrictive clause.
  • nonviolent resistance — passive resistance, peaceful protest
  • north atlantic treaty — the treaty (1949) signed by 12 countries, providing for the establishment of NATO.
  • northumberland strait — the part of the Gulf of St. Lawrence that separates Prince Edward Island from New Brunswick and Nova Scotia, in SE Canada. About 200 miles (320 km) long; 9–30 miles (15–48 km) wide.
  • not hold one's breath — If you say that you won't hold your breath, you mean that you do not expect something to happen even though someone has suggested that it might.
  • nothing in particular — not anything specific
  • nuclear cross section — cross section (def 7).
  • nuclear power station — a station or plant where nuclear energy is converted into heat, electricity, etc
  • objective correlative — a completely depicted situation or chain of events that objectifies a particular emotion in such a way as to produce or evoke that emotion in the reader.
  • observation satellite — an unmanned satellite that observes the earth and gathers data
  • oil-in-water emulsion — An oil-in-water emulsion is a mixture in which an oily medicine is dispersed in water or other liquid.
  • old spanish practices — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
  • olympic national park — a national park in NW Washington. 1323 sq. mi. (3425 sq. km).
  • open telecom platform — (communications, library)   (OTP) A set of standard, open source libraries and tools for use with Erlang.
  • open trading protocol — Internet Open Trading Protocol
  • operational amplifier — a high-gain, high-input impedance amplifier, usually an integrated circuit, that can perform mathematical operations when suitably wired.
  • operational semantics — (theory)   A set of rules specifying how the state of an actual or hypothetical computer changes while executing a program. The overall state is typically divided into a number of components, e.g. stack, heap, registers etc. Each rule specifies certain preconditions on the contents of some components and their new contents after the application of the rule. It is similar in spirit to the notion of a Turing machine, in which actions are precisely described in a mathematical way. Compuare axiomatic semantics, denotational semantics.
  • ophthalmia neonatorum — inflammation of the eyes of a newborn child due to an infectious disease, as gonorrhea, contracted during birth from the infected mother.
  • optical double (star) — double star (sense 2)
  • orthogonal projection — a two-dimensional graphic representation of an object in which the projecting lines are at right angles to the plane of the projection. Also called orthogonal projection. Compare isometric (def 5).
  • orthogonal trajectory — the locus of a point whose path cuts each curve of a family of curves at right angles.
  • otorhinolaryngologist — (medicine) Doctor specializing in otorhinolaryngology, the study of ear, nose, and throat.
  • paradoxical intention — (in psychotherapy) the deliberate practice of a neurotic habit or thought, undertaken in order to remove it
  • parasitic oscillation — (in an electronic circuit) oscillation at any undesired frequency
  • partial reinforcement — the process of randomly rewarding an organism for making a response on only some of the occasions it makes it
  • partially ordered set — a set in which a relation as “less than or equal to” holds for some pairs of elements of the set, but not for all.
  • pellitory-of-the-wall — an urticaceous plant, P. diffusa, of the S and W European genus Parietaria, which grows in crevices and has long narrow leaves and small pink flowers
  • person-to-person call — a call to a specified person; if that person cannot take the call there is no charge
  • personality inventory — a questionnaire designed to measure personality types or characteristics.
  • physical anthropology — the branch of anthropology dealing with the evolutionary changes in human anatomy and physiology, using mensurational and descriptive techniques.
  • piezoelectric ceramic — any ceramic that exhibits piezoelectric properties.
  • piezoelectric crystal — a crystal, such as quartz, that produces a potential difference across its opposite faces when under mechanical stress
  • place of articulation — the location at which two speech organs approach or come together in producing a speech sound, as in the contact of the tongue and the teeth to form a dental sound. Also called point of articulation. Compare articulator (def 2).
  • place of safety order — (in Britain) under the Children and Young Persons Act 1969, an order granted by a justice to a person or agency granting authority to detain a child or young person and take him or her to a place of safety for not more than 28 days, because of the child's actual or likely ill-treatment or neglect, etc
  • play russian roulette — take a foolish risk
  • point of articulation — place of articulation.
  • political correctness — Political correctness is the attitude or policy of being extremely careful not to offend or upset any group of people in society who have a disadvantage, or who have been treated differently because of their sex, race, or disability.
  • politically incorrect — not politically correct; potentially offensive to a particular group of people: politically incorrect jokes.
  • polygenic inheritance — the heredity of complex characters that are determined by a large number of genes, each one usually having a relatively small effect.
  • poor robin's plantain — the rattlesnake weed, Hieracium venosum.
  • populist shop steward — a shop steward who operates in a delegate role, putting the immediate interests of his members before union principles and policies
  • portable commodore 64 — (computer)   A version of the Commodore 64 modelled after the original Osborne portable PCs, with a flip-down keyboard that revealed a 5-inch colour monitor, and a built-in 1541 floppy disk drive. It is thought that few were made but that they did go on sale, at least in Canada.
  • portable common loops — (PCL) A language which started out as an implementation of CommonLoops and turned into a portable CLOS implementation. Version 1992-08-28. It runs under Lucid Common LISP 4.0.1 and CMU Common LISP 16e.
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