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petrol bomb
petrol station
Petrolatum
petrolatum gauze
Petroleum
petroleum future
petroleum geologist
petroleum geology
petroleum jelly
petroleum refinery
Petroleum spirit
Petroleur
Petroline
Petrologic
Petrologically
Petrologist
-- Petrology --
Petromastoid
Petromyzon
Petromyzon marinus
Petromyzoniformes
Petromyzont
Petromyzontidae
Petronel
Petronius
Petronius Arbiter
Petrosal
Petrosal bone
Petroselinum
Petroselinum crispum
Petroselinum crispum neapolitanum
Petroselinum crispum tuberosum
Petrosilex

Petrology

Pe`trol´o`gy
n.1.The department of science which is concerned with the mineralogical and chemical composition of rocks, and with their classification: lithology.
2.A treatise on petrology.
Noun1.petrology - the branch of geology that studies rocks: their origin and formation and composition
geomorphology, morphology

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