Definition of epigenetic in English:



  • 1Biology
    Relating to or arising from nongenetic influences on gene expression.

    ‘epigenetic carcinogens’
    • ‘Such variations might arise from minor genetic differences or by epigenetic influences causing induction, enhancement or inhibition of repair enzyme synthesis or activity.’
    • ‘The embryo is human, since it has the genetic constitution and epigenetic primordia characteristic of human beings.’
    • ‘There are epigenetic influences at work (changes in inheritance by means other than changing DNA sequence,) and we're just barely starting to understand them.’
    • ‘However, backcrossing is a gradual procedure that, apart from being lengthy, cannot ascertain that genetic and epigenetic changes will modify the original nuclear genotype.’
    • ‘Hence, we investigated molecular genetic and epigenetic events in oral carcinogenesis.’
    1. 1.1Relating to or of the nature of epigenesis.
  • 2Geology
    Formed later than the surrounding or underlying rock formation.

    • ‘Thus, the ore minerals form after the host rock and are called epigenetic.’
    • ‘The metamorphic rocks along the northwest margin of the Reading Prong, as well as the adjacent Paleozoic carbonates, contain epigenetic minerals deposited predominantly in open spaces.’
    • ‘Ores formed at the same time as their host rocks are referred to as syngenetic; ores formed after the host rock are called epigenetic.’
    • ‘A number of different theories are postulated for the formation of the copper deposits, but all generally agree that the deposits are epigenetic and that the ore-bearing solutions were hydrothermal.’
    • ‘More recent studies suggest an epigenetic origin, indicating that sulphide-rich iron formation is a replacement type rather than a primary sedimentary facies.’