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.]