Added 9 October 2026
petroleum
/pəˈtɹoʊliəm/ noun
Latin root: petroleum Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about petroleum at Wordnik → Where our words come from →
- A dark oil consisting mainly of hydrocarbons.
Origin
Learned borrowing from Medieval Latin petroleum. Doublet of petrol.
From Wiktionary, via Kaikki.org (CC BY-SA)