lard oil

a colorless or yellowish oil expressed from lard, used chiefly as a lubricant for cutting tools.

Origin of lard oil

First recorded in 1835–45

The polishing is done by means of hard, wooden rubbers, provided with a plentiful supply of lard-oil and emery.

The Atlantic Monthly, Vol. 12, No. 72, October, 1863 |Various
Until he was seven he had been allowed a bit of glimmer, a tiny wick floating in a silver dish of lard-oil, for a night-light.

Long Live the King |Mary Roberts Rinehart
This street and the water-front were lighted--twilighted--with lard-oil lamps; the rest of the place was dark.

Kincaid's Battery |George W. Cable
Cocoanut-oil, lard-oil, and olive-oil have also been used in lighthouses.

Artificial Light |M. Luckiesh

They were lit at night with tallow-candles, which were mostly made by the housewife herself, or by lard-oil glass lamps.

A Boy's Town |W. D. Howells