||Par`a*gen"e*sis (?), n. [NL.; para- + genesis.] (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.

Par`a*gen"e*sis (păr`&adot;*j&ebreve;n"&esl;*s&ibreve;s), n. [Pref. para- + genesis.] (Min.) The science which treats of minerals with special reference to their origin.

||Par`a*gen"e*sis (?), n. [NL.; para- + genesis.] (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.