heterotopyn.
/hɛtəˈrɒtəpi/ Physiology.
Displacement in position, misplacement:
a. Pathology. The occurrence of a tumour in a part where the elements of which it is composed do not normally exist.
ΚΠ
1876 J. Van Duyn & E. C. Seguin tr. E. L. Wagner Man. Gen. Pathol. 355 Tumors are abnormal only because they occur in a locality in which their elements do not normally exist (Heterotopia).
b. Biology. (See quot. 18791.)
ΚΠ
1879 tr. E. Haeckel 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.
1879 tr. E. Haeckel Evol. Man I. i. 13 Displacement of position, or heterotopy, especially affects the cells or elementary parts which compose the organs; but it also affects the organs themselves.
Derivatives
heteroˈtopic adj. = heterotopous adj.
ΚΠ
1878 F. J. Bell & E. R. Lankester tr. C. Gegenbaur Elements Compar. 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.
ˌheteroˈtopically adv. with the result of becoming heterotopic.
ΚΠ
1923 Guy's Hosp. Rep. 73 328 They re-acquired..the prospective fate of being differentiated heterotopically into squamous epithelium.
heteˈrotopism n. = heterotopy n.
ΚΠ
1879 tr. E. Haeckel Evol. Man I. i. 13 An analogous heterotopism affects the primitive kidneys in the higher Vertebrates.
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heteˈrotopous adj. of, pertaining to, or of the nature of heterotopy.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).
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n.1876