Meanings
nounpenetrating oil (countable and uncountable, plural penetrating oils)
plural penetrating oils
- countableuncountableA type of very low-viscosity oil that evaporates quickly.
Synonyms: penetrating fluid
Synonyms & antonyms
nounA type of very low-viscosity oil that evaporates quickly.
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Also see
Origin
Called so because of its penetration into the microscopic interstices of rust and of mating metal surfaces, which aids loosening of fasteners.
Full word history & related roots →Translations
Dutch kruipolie
- kruipolielow-viscosity fluid
French huile pénétrante, huile pour dégripper
- huile pénétrantelow-viscosity fluid
- huile pour dégripperlow-viscosity fluid
German Kriechöl
- Kriechöllow-viscosity fluid
Portuguese óleo desengripante
- óleo desengripantelow-viscosity fluid
Spanish aceite penetrante
- aceite penetrantelow-viscosity fluid
Cite this entry
APA
penetrating oil. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/penetrating%20oil
MLA
“penetrating oil.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/penetrating%20oil. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “penetrating oil,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/penetrating%20oil.
Source: penetrating oil on Wiktionary, CC BY-SA 4.0.