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.
1 Melaleuca alternifolia-This oil is commonly known as Snake Oil or Tea Tree Oil. 2  It has two chemotypes, but both contain terpinen-4-ol or terpinenol-4. 3  This is the constituent that provides the benefits we all love. 4  Some of the chemotypes contain 1, 8 cineole as well.