From Wiktionary, the free dictionary
Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Proto-Indo-European *-éh₂ Ancient Greek -ῐ́ᾱ (-ĭ́ā) Proto-Indo-European *-kos English petrologic
From petrology + -ic.
petrologic (not comparable)
- Of or pertaining to petrology.