Where does this definition of lubricating oil come from?
This entry for lubricating oil is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is lubricating oil a noun, verb, or something else?
In this entry, lubricating oil is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.