pro·to·gine noun alsopro·to·gene\ˈprōd.əˌjēn\ (-s) Etymology:protogine from French, from prot- + -gine (from Greek -genēs born); protogene alteration (influenced by -gene) of protogine 1.: a granite that is especially prevalent in the central Alps and that has a gneissoid texture prob. due to dynamic action 2.: a rock with authigenic constituents