Meanings
proper noun
- One of 56 counties in Montana, United States. County seat: Winnett.
Origin
Named for the discovery of petroleum, or oil.
Full word history & related roots →Cite this entry
APA
Petroleum County. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Petroleum%20County
MLA
“Petroleum County.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Petroleum%20County. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Petroleum County,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Petroleum%20County.
Source: Petroleum County on Wiktionary, CC BY-SA 4.0.