17-letter words containing l, o, a, r

natural selection — the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.
natural-resources — a naturally occurring source of wealth, as land or water.
naval air station — military airbase for the navy
naval observatory — an astronomical observatory located in Washington, D.C., operated by the U.S. government, and responsible for the U.S. time service.
neath port talbot — a county borough in S Wales, created from part of West Glamorgan in 1996. Administrative centre: Port Talbot. Pop: 135 300 (2003 est). Area: 439 sq km (169 sq miles)
negative polarity — the grammatical character of a word or phrase, such as ever or any, that may normally be used only in a semantically or syntactically negative or interrogative context
nephelometrically — By means of nephelometry.
neurobiologically — In terms of or by means of neurobiology.
neuropathological — (medicine) Of, pertaining to, or arising from neuropathology, the pathology of nerve tissue.
neuropharmacology — the branch of pharmacology concerned with the effects of drugs on the nervous system.
never looked back — If you say that someone did something and then never looked back, you mean that they were very successful from that time on.
new orleans style — a style of jazz developed in New Orleans early in the 20th century, influenced by blues, ragtime, marching band music, and minstrelsy and marked by polyphonic group improvisation.
new scotland yard — See under Scotland Yard (def 1).
nicholas bourbaki — the pseudonym of a group of mainly French mathematicians that, since 1939, has been producing a monumental work on advanced mathematics, Eléments de Mathématique
non-biodegradable — capable of decaying through the action of living organisms: biodegradable paper; biodegradable detergent.
non-controversial — of, relating to, or characteristic of controversy, or prolonged public dispute, debate, or contention; polemical: a controversial book.
non-environmental — the aggregate of surrounding things, conditions, or influences; surroundings; milieu.
non-instructional — the act or practice of instructing or teaching; education.
non-manual worker — a person whose job involves the use of their mind, rather than the use of their hands or physical strength
non-materialistic — excessively concerned with physical comforts or the acquisition of wealth and material possessions, rather than with spiritual, intellectual, or cultural values.
non-proliferation — Non-proliferation is the limiting of the production and spread of something such as nuclear or chemical weapons.
non-stereotypical — a process, now often replaced by more advanced methods, for making metal printing plates by taking a mold of composed type or the like in papier-mâché or other material and then taking from this mold a cast in type metal.
non-thermoplastic — soft and pliable when heated, as some plastics, without any change of the inherent properties.
nonalcoholic beer — Nonalcoholic beer is beer that does not contain any alcohol.
noninertial frame — a frame of reference that moves with the object, so that the moving object appears to violate Newton's laws of motion since it accelerates despite having no horizontal forces on it.
nonunderstandable — Not understandable.
nord-ostsee kanal — German name of Kiel Canal.
normal orthogonal — orthonormal.
north lanarkshire — a council area of central Scotland: consists mainly of the NE part of the historical county of Lanarkshire; formerly (1974–96) part of Strathclyde Region: engineering and metalworking industries. Administrative centre: Motherwell. Pop: 321 820 (2003 est). Area: 1771 sq km (684 sq miles)
north-wall hammer — a type of ice axe that has a hammer as part of its head
not lift a finger — any of the terminal members of the hand, especially one other than the thumb.
not spare oneself — to exert oneself to the full
nuclear isomerism — isomerism (def 2).
nuclear radiation — Physics. radiation in the form of elementary particles emitted by an atomic nucleus, as alpha rays or gamma rays, produced by decay of radioactive substances or by nuclear fission.
nuclear threshold — the point in war at which a combatant brings nuclear weapons into use
nuclear-free zone — any area in which nuclear weapons, power plants, or materials are not allowed.
nuclear-isomerism — Chemistry. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism) as CH 3 OCH 3 and CH 3 CH 2 OH, or in the arrangement of their atoms in space and therefore in one or more properties. Compare optical isomerism, stereoisomerism.
numerical control — control of a machine tool, or other device used in a manufacturing process, by a computer, other control circuitry, or recorded digital commands.
oceanographically — In terms of oceanography.
off-year election — (in the US) an election held in a year when a presidential election does not take place
official receiver — an officer appointed by the Insolvency Service to receive the income and manage the estate of a bankrupt pending the appointment of a trustee in bankruptcy
old age pensioner — An old age pensioner is a person who is old enough to receive an pension from their employer or the government.
old norman french — Norman French (sense 1)
old orchard beach — a resort town in S Maine.
old red sandstone — a thick sequence of sedimentary rock (generally, but not always, red) deposited in Britain and NW Europe during the Devonian period
old south arabian — a group of four closely related Semitic languages, having a writing system and used from about the eighth to the fifth centuries b.c. in the southern part of Arabia.
old spanish trail — an overland route from Santa Fe, N. Mex., to Los Angeles, Calif., first marked out in 1776 by Spanish explorers and missionaries.
omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
on the barrelhead — upon being presented for sale; at the time of delivery
one-parent family — A one-parent family is a family that consists of one parent and his or her children living together.

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