(automotive) A lubricant for use on the fork of a motorcycle.

(idiomatic) To work studiously, especially late into the night.

An olive oil obtained from the first pressing of the olives.

Oil, extracted from the seeds of the evening primrose, used as a complementary medicine (for example, to relieve premenstrual stress).

An unusual disease that broke out in Spain in 1981, resembling a lung infection but unaffected by antibiotics, caused by the consumption of imported rapeseed oil, intended for industrial use, that had been sold as olive oil.

Something that operates capably through the effective coordination of many parts.

plural of well-oiled machine

Oil derived from the liver of codfish, often used as a nutritional supplement due to its high levels of omega-3 fatty acids, EPA and DHA, and very high levels of vitamin A and vitamin D.

Alternative form of cod liver oil

Third-person singular simple present indicative form of burn the midnight oil