1. in a manner relating to petrology, the study of rocks and their formation, composition, and structure
Usage: technical; scientific

Examples

• The samples were analyzed petrologically to determine their mineral composition.
• Petrologically speaking, this granite shows evidence of slow cooling.
• The team examined the volcanic rocks petrologically before publishing their findings.
• These sedimentary layers can be distinguished petrologically by their grain size and sorting.
• The geologist described the stone petrologically as a metamorphic rock with foliated texture.