epigeneadj.

/ˈɛpɪdʒiːn/

Etymology: < French épigène, < Greek ἐπιγενής, < ἐπί upon, after + -γενής born, originating. The Greek word occurs with sense ‘arising subsequently (to birth)’, said of a disease, in opposition to ‘congenital’. This use seems to be the source of sense 1; in sense 2 the prefix is taken as = ‘upon’, ‘above’.

1. Crystallography. See quot. 1823. By some writers used for pseudomorphous.

ΚΠ

1823 H. J. Brooke Familiar Introd. Crystallogr. 93 To one class of these [crystals] the Abbé Haüy has applied the name of Epigene, where a chemical alteration has taken place in the substance of the crystal subsequently to its formation.

1851 J. Ruskin Stones of Venice I. Pref. p. vii The epigene crystal, formed by materials of one substance modelled on the perished crystals of another.

2. Geology. Produced on the surface of the earth: opposed to hypogene.

ΚΠ

1880 A. Geikie in Nature 4 Nov. 4/2 The whole epigene army of destructive agencies, air, rain, frost, streams, glaciers, and ice-sheets.

1882 A. Geikie Text-bk. Geol. iii. i. 196 Epigene or Surface Action—the changes produced on the superficial parts of the earth.

1882 A. Geikie Text-bk. Geol. iii. ii. 316 The word epigene may be suggested as..antithetical to hypogene.

This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2018).

单词	epigene
释义	epigeneadj. /ˈɛpɪdʒiːn/ Etymology: < French épigène, < Greek ἐπιγενής, < ἐπί upon, after + -γενής born, originating. The Greek word occurs with sense ‘arising subsequently (to birth)’, said of a disease, in opposition to ‘congenital’. This use seems to be the source of sense 1; in sense 2 the prefix is taken as = ‘upon’, ‘above’. 1. Crystallography. See quot. 1823. By some writers used for pseudomorphous. ΚΠ 1823 H. J. Brooke Familiar Introd. Crystallogr. 93 To one class of these [crystals] the Abbé Haüy has applied the name of Epigene, where a chemical alteration has taken place in the substance of the crystal subsequently to its formation. 1851 J. Ruskin Stones of Venice I. Pref. p. vii The epigene crystal, formed by materials of one substance modelled on the perished crystals of another. 2. Geology. Produced on the surface of the earth: opposed to hypogene. ΚΠ 1880 A. Geikie in Nature 4 Nov. 4/2 The whole epigene army of destructive agencies, air, rain, frost, streams, glaciers, and ice-sheets. 1882 A. Geikie Text-bk. Geol. iii. i. 196 Epigene or Surface Action—the changes produced on the superficial parts of the earth. 1882 A. Geikie Text-bk. Geol. iii. ii. 316 The word epigene may be suggested as..antithetical to hypogene. This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2018). < adj.1823
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