epigenetic

adjective

1. Biology. of or relating to epigenesis, or the successive differentiation of undifferentiated cells in an embryo.
2. Genetics. noting or pertaining to epigenetics, specifically, the process by which the expression of genetic information is modified on a molecular level without a change to the DNA sequence: the epigenetic inheritance of longevity.

adjective

1. of or relating to epigenesis
2. denoting processes by which heritable modifications in gene function occur without a change in the sequence of the DNA