| 单词 |
heterotopy |
| 释义 |
heterotopy Phys.|hɛtəˈrɒtəpɪ|
[ad. mod.L. heterotopia (also in Engl. use), f. Gr. ἑτερο- hetero- + -τοπια, f. τόπος place.]
Displacement in position, misplacement: a. Path. The occurrence of a tumour in a part where the elements of which it is composed do not normally exist. b. Biol. (See quot. 1879.)
1876tr. Wagner's Gen. Pathol. 355 Tumors are abnormal only because they occur in a locality in which their elements do not normally exist (Heterotopia). 1879tr. Haeckel's Evol. Man I. i. 12 The kenogenetic vitiations of the original palingenetic incidents of evolution depend in great measure on a gradually occurring displacement of the phenomena..by adaptation to the changed conditions of embryonic existence.— This displacement may affect either the place or the time of the phenomena.—If the former, it is called Heterotopy; if the latter, Heterochrony. Ibid. 13 Displacement of position, or heterotopy, especially affects the cells or elementary parts which compose the organs; but it also affects the organs themselves.
Hence heteroˈtopic, heteˈrotopous adjs., of, pertaining to, or of the nature of heterotopy; hence ˌheteroˈtopically adv., with the result of becoming heterotopic; heteˈrotopism = heterotopy.
1878Bell Gegenbaur's Comp. Anat. 45 The different position occupied by visual organs forbids us to suppose that they have had a common hereditary origin, and is in favour of these heterotopic organs having been independently differentiated from an indifferent apparatus. 1879tr. Haeckel's Evol. Man I. i. 13 An analogous heterotopism affects the primitive kidneys in the higher Vertebrates. 1923Guy's Hosp. Rep. LXXIII. 328 They re-acquired..the prospective fate of being differentiated heterotopically into squamous epithelium. |
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单词 heterotropal 释义 heterotropal, a. Bot.|-trpl|[f. Gr. ἑ- turning another way (f. ἑ-......