| natural mutation | A mutation which occurs by itself without first being affected by a mutagen, for example during the process of DNA replication. Spontaneous mutations arise at a remarkably constant rate. The rate that spontaneous mutations arise has been used as an evolutionary clock to estimate how closely related two (or more) separate species are to each other. (09 Oct 1997) |
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| natural passive immunity | Immunity conferred by the mother on the foetus or newborn. (14 Nov 1997) |
| natural pigment | A naturally occurring coloured compound; absorbs light in the visible range of the electromagnetic spectrum. Compare: structural colour. Synonym: biochrome. (05 Mar 2000) |
| natural products | Naturally occurring compounds that are end products of secondary metabolism; often, they are unique compounds for particular organisms or classes of organisms. (05 Mar 2000) |
| natural selection | The hypothesis that genotype environment interactions occurring at the phenotypic level lead to differential reproductive success of individuals and hence to modification of the gene pool of a population. (18 Nov 1997) |
| naturalism | 1. A state of nature; conformity to nature. 2. <psychology> The doctrine of those who deny a supernatural agency in the miracles and revelations recorded in the Bible, and in spiritual influences; also, any system of philosophy which refers the phenomena of nature to a blind force or forces acting necessarily or according to fixed laws, excluding origination or direction by one intelligent will. Origin: Cf. F. Naturalisme. Source: Websters Dictionary (01 Mar 1998) |
| naturalist | 1. One versed in natural science; a student of natural history, especially. Of the natural history of animals. 2. One who holds or maintains the doctrine of naturalism in religion. Origin: Cf. F. Naturaliste. Source: Websters Dictionary (01 Mar 1998) |
| natural history |
"Natural history" is an umbrella term for what are now usually viewed as a number of distinct scientific disciplines. Most definitions include the study of living things (e.g. biology, including botany and zoology); other definitions extend the topic to include paleontology, ecology or biochemistry, as well as parts of geology and physics and even meteorology. A person interested in natural history is known as a naturalist. This was predominantly an amateur activity and not an occupation. ...
출처: en.wikipedia.org/wiki/Natural_history
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| natural |
In category theory, an abstract branch of mathematics, a natural transformation provides a way of transforming one functor into another while respecting the internal structure (i.e. the composition of morphisms) of the categories involved. Hence, a natural transformation can be considered to be a "morphism of functors". Indeed this intuition can be formalized to define so called functor categories. ...
출처: en.wikipedia.org/wiki/Natural_(category_theory)
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| natural childbirth |
The natural childbirth technique attempts to minimize medical intervention, particularly anaesthetics, during childbirth. Proponents advocate that anaesthetics may increase the likelihood of complications, because labor may be slowed or the woman may not be able to adequately direct her body to push properly during final delivery. ...
출처: en.wikipedia.org/wiki/Natural_childbirth
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| natural selection |
Natural selection is a process by which biological populations are altered over time, as a result of the propagation of heritable traits that affect the capacity of individual organisms to survive and reproduce. It is one of several mechanisms that give rise to the evolution of biological species (other mechanisms include genetic drift and gene flow. ...
출처: en.wikipedia.org/wiki/Natural_selection
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| natural killer cell |
NK cell. A type of white blood cell that contains granules with enzymes that can kill tumor cells or microbial cells. Also called a large granular lymphocyte.
출처: www.stjude.org/glossary
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| Natura | unthinking |
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| Natura | ability that is inherited |
| Natura | a process existing in or produced by nature (rather than by the intent of human beings) |
| Natura | labor and childbirth without medical intervention |
| Natura | a natural object that covers or envelops |
| Natura | a sunken or depressed geological formation |
| Natura | a raised or elevated geological formation |
| Natura | a naturally enclosed space |
| Natura | natural qualities or talents |
| Natura | an event that happens |
| Natura | any of several methods of family planning that do not involve sterilization or contraceptive devices or drugs |
| Natura | derived from plants or animals |