Definition of mineral oil
: an oil of mineral origin; especially : a refined petroleum oil used especially as a laxative
First Known Use of mineral oil
Medical Definition of mineral oil
1: a liquid product of mineral origin that has the viscosity of an oil
2: a transparent oily liquid obtained usually by distilling petroleum and used chiefly in medicine for treating constipation and especially formerly as a demulcent and solvent for nose and throat medication—called also liquid petrolatum, white mineral oil
Seen and Heard
What made you want to look up mineral oil? Please tell us where you read or heard it (including the quote, if possible).