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.
Updated April 19, 2016. Black seed oil is a substance sourced from the seeds of Nigella sativa, a plant native to Asia. Long used in herbal medicine, black seed oil is said to offer a wide range of health benefits. One of the key components of black seed oil is thymoquinone, a compound with antioxidant effects.