| 单词 |
orthomorphic |
| 释义 |
orthomorphic, a.|ɔːθəʊˈmɔːfɪk|
[f. ortho- + Gr. µορϕή form + -ic.]
†1. Biol. (See quots.) Obs. rare.
1866Brande & Cox Dict. Sci., etc., Orthomorphic.., that period in the developement of organised beings in which their full perfection is attained, prior to the formation of spermatic and germinal elements. 1892Syd. Soc. Lex., Orthomorphic, term applied to animals which attain their full size before the development of the generative organs.
2. Preserving the true or original shape of infinitesimal parts: applied to a class of map-projections in which small areas retain their correct shapes.
orthomorphic transformation, or orthomorˈphosis (Math.), a functional transformation which expresses the representation of one geometrical plan by another of which the infinitesimal parts retain their accurate form.
1882T. Craig (U.S. Coast Survey) Treatise on Projections 33 It will be convenient to use the term given by Germain to such projections, and so we shall call them orthomorphic. 1891Cayley Wks. XIII. 191 The author [Schwartz] considers the orthomorphic transformation (or, as I call it, the orthomorphosis) of a square into the infinite half-plane, or into a circle. Ibid., It is easy to deduce the orthomorphosis of the rectangle into a circle. 1900C. F. Close Sketch of Map Projections 10, Orthomorphic (or conform or conformable): in these the scale is the same in all directions round a point in its immediate neighbourhood. Ibid. 17. 1910 [see conformal a. 2]. 1937Jrnl. Optical Soc. Amer. XXVII. 338/2 The only telescope with orthomorphic object and image spaces is the unit power telescope. 1938,1957[see conformal a. 2]. 1971Jrnl. Photographic Sci. XIX. 24/2 A slit width of 1/4 in. was used for orthomorphic copying.
Hence orthoˈmorphism, the property of being orthomorphic.
1919Wireless World May 69/2 Orthomorphism..may be possessed by many different types of graticule. 1940Geogr. Jrnl. XCV. 381 It is well to preserve orthomorphism, if only for its help in solving great circle problems. 1975J. B. Harley O.S. Maps ii. 19 The projection stretched the topography equally in all directions, rather than only in a north–south direction, and this gave it the property of conformality or orthomorphism, in which there is a minimal distortion of shape over small areas and the scale..is likewise equal in all directions at any one point. |
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