Definition of ESTRUS. : a regularly recurrent state of sexual excitability during which the female of most mammals will accept the male and is capable of conceiving: heat; also: a single occurrence of this state. See estrus defined for kids.
1. (medicine) any of various liquids sold as medicine (as by a travelling medicine show) but medically worthless. 2. communication (written or spoken) intended to deceive. Familiarity information: SNAKE OIL used as a noun is rare. Dictionary entry details.
Noun. 1. mineral oil-a distillate of petroleum (especially one used medicinally as a laxative or stool softener). oil-a slippery or viscous liquid or liquefiable substance not miscible with water.1  Facebook.. (Minerals) Brit any oil of mineral origin, esp petroleum. 2. US and Canadian a colourless almost tasteless oily liquid obtained by petroleum distillation and used as a laxative. Also called (in Britain and certain other countries): liquid paraffin.