'Paragenesis' definitions:

Definition of 'Paragenesis'

From: GCIDE

Paragenesis \Par`a*gen"e*sis\ (p[a^]r`[.a]*j[e^]n"[-e]*s[i^]s), n. [Pref. para- + genesis.]
1. (Min.) The science which treats of minerals with special reference to their origin. [1913 Webster]
2. (Geol.) (a) The formation of minerals in contact, so as to affect one another's development. (b) The order in which minerals occurring together in rocks and veins have developed. [Webster 1913 Suppl.]