pet·ro·gen·e·sis 
(pĕt′rō-jĕnĭ-sĭs)
(pĕt′rō-jĕnĭ-sĭs)n.
The branch of petrology that deals with the origin of rocks, especially igneous rocks.
pet′ro·ge·netic (-jə-nĕtĭk) adj.
- neoconservative
- neocortex
- neocortical
- Neo-Darwinian
- Neo-Darwinism
- Neo-Darwinist
- neodymium
- neo-expressionism
- neo-expressionist
- neofascism
- neofascist
- neoflavone
- Neo-Freudian
- Neogene
- neogenesis
- neogenetic
- neoimpressionism
- neo-impressionism
- neoimpressionist
- Neo-Lamarckian
- Neo-Lamarckism
- neoliberal
- neoliberalism
- neolith
- Neolithic