| 영문 | symmetry | 한글 | 대칭 |
|---|---|---|---|
| 설명 | 점이나 또는 평면에서 양쪽에 있는 부분이 똑같은 형으로 배치되어 있는 것. 점인 경우는 점대칭, 평면인 경우는 평면대칭이라 한다. 평면상에 두 개의 도형 F와 F-가 있을 때 F상의 점 P와 F-상의 점 P-를 대응시켜 대응하는 점 P와 P-를 연결하는 항상 하나의 정점 O로써 이등분된다면 도형 F와 F-는 점 O에 대하여 점대칭이다. 또한 평면상의 두 도형 F와 F-가 있을 때 F상의 점 P와 F-상의 점 P-를 대응시켜 대응하는 점 P와 P-를 연결한 선이 항상 일정한 직선1에 의해 수직 이등분되면 도형 F와 F-는 직선에 대해 선대칭이다. 같은 방법으로 공간에서의 면대칭을 정의할 수 있다. |
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| a.t. | acquisition time; 영상회복시간 = TR x N x Nex TR; Time to Repeat &... |
|---|---|
| VDRE | Vitamin D Responsive Element |
| ACSE | association control service element |
| BEP | brain evoked potential; basic element of performance |
| CE | California encephalitis; cardiac enlargement; cardioesophageal; carotid endarterectomy; catamenial e... |
| DSE | dyad symmetry element |
|---|---|
| NCS | Non-crystallographic symmetry |
| SREBP | 1/sterol regulatory element binding protein |
| TRE | 12-(O-tetradecanoylphorbol-13-acetate response element |
| TRE | 12-O-tetradecanoyl-phorbol-13-acetate responsive element |
| dyad symmetry element | Dyad symmetry element bound by serum response factor to control the expression of c fos. (18 Nov 1997) |
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| dyad symmetry of DNA | <molecular biology> Two areas of a DNA molecule whose base pair sequences are repeats of each other, inverted relative to each other, or are palindromes. (09 Oct 1997) |
|---|---|
| dyad | A pair. Two units. Half of a tetrad (four units). What happens to bivalent (tetrad) chromosomes after the first nuclear division of meiosis. (09 Oct 1997) |
| axis of symmetry | An axis through a particle (e.g., a virus) on such a plane that, if the particle is rotated on the axis, there are two or more positions at which the particle appears identical. (05 Mar 2000) |
| bilateral symmetry | <biology> Describes an organism which is divisible into equal mirror halves in one plane only. (09 Oct 1997) |
| pseudo-symmetry | <chemistry> A kind of symmetry characteristic of certain crystals which from twinning, or other causes, come to resemble forms of a system other than that to which they belong, as the apparently hexagonal prisms of aragonite. Origin: Pseudo- + symmetry. Source: Websters Dictionary (01 Mar 1998) |
| symmetry | 1. A due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several parts of a thing to each other; the union and conformity of the members of a work to the whole. 2. <biology> The law of likeness; similarity of structure; regularity in form and arrangement; orderly and similar distribution of parts, such that an animal may be divided into parts which are structurally symmetrical. Bilateral symmetry, or two-sidedness, in vertebrates, etc, is that in which the body can be divided into symmetrical halves by a vertical plane passing through the middle; radial symmetry, as in echinoderms, is that in which the individual parts are arranged symmetrically around a central axis; serial symmetry, or zonal symmetry, as in earthworms, is that in which the segments or metameres of the body are disposed in a zonal manner one after the other in a longitudinal axis. This last is sometimes called metamerism. 3. <botany> Equality in the number of parts of the successive circles in a flower. Likeness in the form and size of floral organs of the same kind; regularity. Axis of symmetry. <geometry> See Axis. Respective symmetry, that disposition of parts in which only the opposite sides are equal to each other. Origin: L. Symmetria, Gr.; with, together + a measure: cf. F. Symetrie. See Syn-, and Meter rhythm. Source: Websters Dictionary (01 Mar 1998) |
| symmetry axis | <radiobiology> The straight line (usually vertical) through the centre of a configuration, when the configuration is symmetric to all (axisymmetric, like the tokamak) or some (periodic, like the stellarator) rotations about this line. Usually the z-axis. (09 Oct 1997) |
| inverse symmetry | Correspondence of the right or left side of an asymmetrical individual to the left or right side of another. (05 Mar 2000) |
| amphoteric element | An element one or more of whose oxides unite with water to form hydroxides that may act as acids or as bases (e.g., aluminum). (05 Mar 2000) |
| anatomical element | Any anatomical unit, such as a cell. Synonym: morphologic element. (05 Mar 2000) |
| vessel element | Part of a xylem vessel in a higher plant, arising from a single cell. The end walls are perforated and may completely disappear, giving rise to a continuous tube. The remaining walls are thickened and lignified and there is no protoplast. (18 Nov 1997) |
| volume element | See: voxel. (05 Mar 2000) |
| P element | <molecular biology> A class of Drosophila transposon, widely used as a vector for reporter genes, for efficient germ line transformation and for enhancer trap or insertional mutagenesis studies. (18 Nov 1997) |
| mobile genetic element | <molecular biology> Small, mobile DNA sequences that can replicate and insert copies at random sites within chromosomes. They have nearly identical sequences at each end, oppositely oriented (inverted) repeats and code for the enzyme, transposase, that catalyses their insertion. Bacteria have two types of transposon, simple transposons that have only the genes needed for insertion and complex transposons that contain genes in addition to those needed for insertion. Eukaryotes contain two classes of mobile genetic elements, the first are like bacterial transposons in that DNA sequences move directly. The second class (retrotransposons) move by producing RNA that is transcribed, by reverse transcriptase, into DNA which is then inserted at a new site. (13 Nov 1997) |
| picture element | <microscopy> Any segment of a video scan line whose dimension along the line is equal to the line spacing. (05 Aug 1998) |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|