mustard oil

American  

noun

1. oil expressed from the seed of mustard, used chiefly in making soap.

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mustard oil British  

noun

1. an oil that is obtained from mustard seeds and used in making soap

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Etymology

Origin of mustard oil

First recorded in 1840–50

Example Sentences

The authors found that the three variants were associated with a lower pain threshold in response to skin pricking after prior exposure to mustard oil, but not in response to heat or pressure.

From Science Daily • Oct. 10, 2023

Coconut and mustard oil are a stellar combination here, as the sweetness of the coconut tempers the bitterness of the mustard oil and seeds.

From Seattle Times • Apr. 30, 2023

The bitter sulfurous compounds are part of a Brussels sprouts' sophisticated defense system, known as the mustard oil bomb, that repels insects from biting them but attracts those insects that allow pollination.

From Salon • Dec. 25, 2022

Unlike control mice, they didn’t nurse their wounds, licking their paws obsessively when they were burned, injected with mustard oil, or pinched by a metal clip that they couldn’t remove.

From Science Magazine • Dec. 10, 2018

Just before we lay down to sleep, Mrs. Lai gave Sass some mustard oil and camphor to rub on Hari’s chest.

From "Homeless Bird" by Gloria Whelan