oil obtained from walnuts, hazelnuts, etc, used in paints and varnishes and in cooking
What Does 🌰 Chestnut Emoji Mean?The chestnut emoji is sometimes referred to as the raisin emoji because it is so often mistaken for one—especially on small screens and on digital platforms where the nut is very dark brown.
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
Examples from the Web for nut oil
Pacheco mentions "salad oil" with honey, in a mixture of flour paste for grounds; but this may have been nut-oil.
An oil is expressed from its kernel which is known as nut-oil, and is much used by painters as a drying oil.