rock oil

noun

Naphtha (liquid petroleum).

Similar
petroleumcrude oilcrudefossil oiloil
OriginLatin petroleum →
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Meanings

nounrock oil (countable and uncountable, plural rock oils)

plural rock oils · alternative rock-oil

  1. countabledateduncountableNaphtha (liquid petroleum).
  2. countableobsoleteuncountablePetroleum

Synonyms & antonyms

nouna dark oil consisting mainly of hydrocarbons

Similar
petroleumcrude oilcrudefossil oiloil
Broader
oilfossil fuel
Also see
crudecrude oilearth oilfossil oiloilpetroleum

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinpetroleum
  2. Englishrock oil

From rock + oil, a literal rendering of Latin petroleum (literally “rock oil”).

More words from Latin

Full word history & related roots →
Cite this entry
APA

rock oil. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/rock%20oil

MLA

“rock oil.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/rock%20oil. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “rock oil,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/rock%20oil.

Source: rock oil on Wiktionary, CC BY-SA 4.0.