mustard oil


Medical Definition of mustard oil

1 : a colorless to pale yellow pungent irritating essential oil that is obtained by distillation from the seeds usually of black mustard after expression of the fatty oil and maceration with water, that consists largely of allyl isothiocyanate, and that is used especially in liniments and medicinal plasters — compare sinigrin
b : an isothiocyanate ester

Learn More About mustard oil

Dictionary Entries Near mustard oil

mustard gas

mustard oil

mustard plaster

See More Nearby Entries 

Cite this Entry

“Mustard oil.” Medical Dictionary, Merriam-Webster, Accessed 19 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Spell It

Can you spell these 10 commonly misspelled words?

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!