Ep"i*gene (?), a. [Pref. epi- + Gr. to be born, grow.]
1. Crystallog.
Foreign; unnatural; unusual; -- said of forms of crystals not natural to the substances in which they are found.
2. Geol.
Formed originating on the surface of the earth; -- opposed to hypogene; as, epigene rocks.
© Webster 1913.