Along with eggs, I've used previously unopened sour cream WAY (, way) past the date and do the same as you once it's opened. Between the pasteurization of the original milk and then innoculation with good microbes, the lower moisture content and the acidity, it's not a very hospitable environment for pathogens.
Cauterization definition, to burn with a hot iron, electric current, fire, or a caustic, especially for curative purposes; treat with a cautery. See more. Dictionary.com
An agent or device used for scarring, burning, or cutting the skin or other tissues by means of heat, cold, electric current, ultrasound, or caustic chemicals. 2. Use of a cautery. cautery. 1. an agent used for cauterization. 2. cauterization. 1. an instrument that destroys tissue by burning. 2. the application of such an instrument.