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mustard oil

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noun

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

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Origin of mustard oil

First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for mustard oil

mustard oil

noun

an oil that is obtained from mustard seeds and used in making soap
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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