Any circuit's black wire should be considered hot or live. Black wire is never used for a ground or neutral wire and should be used as the power feed for a switch or an outlet. A black wire is often used in a circuit as a switch leg, the connection that runs from the switch to the electrical load.
Medical Definition of distillation. 1  1: a process that consists of driving gas or vapor from liquids or solids by heating and condensing to liquid products and that is used especially for purification, fractionation, or the formation of new substances. 2  2: something distilled.
Definition: Distillation is the technique of heating a liquid to create vapor which is collected when cooled separate from the original liquid. Examples: Pure water can be separated from salt water through distillation. Salt water is boiled to create water steam, but the salt remains in the solution.