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.
Distillation is the process of separating two or more liquids based on differences in their boiling points. When the liquidsâ boiling points are very similar, however, separation by normal distillation becomes ineffective or impossible. Fractional distillation is a modified distillation process that allows the separation of liquids with similar boiling points. Boiling Points A liquidâs boiling point is the temperature at which it transforms to vapor.