18-letter words containing u, n, a, c
- national insurance — In Britain, national insurance is the state system of paying money to people who are ill, unemployed, or retired. It is financed by money that the government collects from people who work, or from their employers.
- natural childbirth — childbirth involving little or no use of drugs or anesthesia and usually involving a program in which the mother is psychologically and physically prepared for the birth process.
- natural convection — Natural convection is the loss of heat from a hot solid or liquid into air which is not artificially agitated.
- natural resistance — natural immunity.
- naval architecture — the science of designing ships and other waterborne craft.
- neovascularization — the development of new blood vessels, especially in tissues where circulation has been impaired by trauma or disease.
- neural tube defect — any of a group of congenital abnormalities involving the brain and spinal cord, including spina bifida and meningocele, caused by failure of the neural tube to close properly during embryonic development.
- neurophysiological — the branch of physiology dealing with the functions of the nervous system.
- neuropsychodynamic — Of or pertaining to neuropsychodynamics.
- neuropsychological — Of or pertaining to neuropsychology, the relation or combination of brain and mind.
- no-fault insurance — Also called no-fault insurance. a form of automobile insurance designed to enable the policyholder in case of an accident to collect a certain basic compensation promptly for economic loss from his or her own insurance company without determination of liability.
- nocturnal emission — the release of semen during sleep, often during a sexual dream.
- non-accountability — the state of being accountable, liable, or answerable.
- non-circumstantial — of pertaining to, or derived from circumstances: a circumstantial result.
- non-contextualized — to put (a linguistic element, an action, etc.) in a context, especially one that is characteristic or appropriate, as for purposes of study.
- nonintercourse act — the act of Congress (1809) prohibiting all shipping and trade between the United States and British- or French-controlled ports.
- nonstriated muscle — smooth muscle
- north truchas peak — a mountain in N New Mexico, near Santa Fe: one of the three Truchas Peaks. 13,110 feet (3999 meters).
- not to have a clue — to be completely baffled
- noun incorporation — a process in word formation by which a compound is created by affixing or infixing a noun to a verb, as in baby-sit, house-hunt, and sleep-walk.
- nuclear capability — If a country has nuclear capability, it is able to produce nuclear power and usually nuclear weapons.
- numerical analysis — the branch of mathematics dealing with methods for obtaining approximate numerical solutions of mathematical problems.
- numerical aperture — a measure of the resolving power of a microscope, equal to the index of refraction of the medium in which the object is placed multiplied by the sine of the angle made with the axis by the most oblique ray entering the instrument, the resolving power increasing as the product increases. Abbreviation: N.A.
- numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
- numerical taxonomy — classification of organisms by a comparison of large numbers of observable characteristics that are given equal value instead of being weighted according to possible evolutionary significance.
- nurse practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
- nurse-practitioner — a registered nurse who has received special training for diagnosing and treating routine or minor ailments. Abbreviation: NP.
- nursery facilities — places where young children are looked after
- occupational group — An occupational group is a category used by insurance companies to classify jobs according to how hazardous they are.
- oedipus at colonus — a tragedy by Sophocles, written toward the end of his life and produced posthumously in 401? b.c.
- oil of catechumens — holy oil used in baptism, the ordination of a cleric, the coronation of a sovereign, or in the consecration of a church.
- on automatic pilot — If you are on automatic pilot or on autopilot, you are acting without thinking about what you are doing, usually because you have done it many times before.
- on delicate ground — in a situation requiring tact
- on the back burner — low priority
- optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
- orientation course — induction into sth
- orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
- out of circulation — If someone is out of circulation, they do not appear in public or at social gatherings for a period of time. You can also say that someone is out of circulation when they are in prison.
- over-pronunciation — to pronounce (a word, syllable, etc.) in an exaggerated, affected, or excessively careful manner.
- oxalosuccinic acid — an organic acid, C 6 H 6 O 7 , that is an intermediate formed by the dehydrogenation of isocitric acid in fat and carbohydrate metabolism.
- pacinian corpuscle — (sometimes lowercase) a microscopic, onionlike body consisting of layers of connective tissue wrapped around a nerve ending, located in the deep layers of skin, tendons, etc., and functioning as a sensory receptor of pressure and vibration.
- paediatric nursing — the branch of nursing concerned with the care of children
- pan american union — a former organization of American republics dedicated to furthering understanding and peace: replaced in 1970 by the secretariat of the Organization of American States.
- parachute regiment — an airborne regiment of an army
- parallel computing — parallel processing
- parallel reduction — A form of applicative order reduction in which all redexes in an expression are reduced simultaneously. Variants include parallel outermost reduction and lenient reduction. See normal order reduction.
- pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
- perceptual defence — the process by which it is thought that certain stimuli are either not perceived or are distorted due to their offensive, unpleasant, or threatening nature
- perceptual mapping — the use of a graph or map in the development of a new product, in which the proximity of consumers' images of the new product to those of an ideal product provide an indication of the new product's likely success
- percussion flaking — a method of forming a flint tool by striking flakes from a stone core with another stone or a piece of bone or wood.