Aerating is a term for:
1. Exposing to the chemical action of air;
2. Causing air to bubble through;

Adoption is the legal and voluntary taking and treating of the child of other parents as one?s own in so far as provided by the laws of the country. By means of a judicial process, whether related or not to the adopter, the adopted child acquires the rights and status of a legitimate child.

Adhesive binding machine has something to do with a machine that applies an adhesive, and sometimes a cloth lining to the edges of the leaves or sections of a book. Adhesive binding machines may be classified as:

Acting is the process of portraying characters written in a screenplay through an interpretation of an actor who is the person portraying a role in a performance on stage or in the movies and television.

Ash relates to impurities consisting of silica, iron, alumina, and other noncombustible matter that are contained in coal.

Aptitude-testing is described as the process of evaluating the level at which an individual is capable of learning new skills. The individual will be administered a standardized test comprising of basic math and Reading problems in the attempt to identify potential barriers to training.

Alkaline substance refers to chemical compounds in which the basic hydroxide (OH-) ion is united with a metallic ion, such as sodium hydroxide (NaOH) or potassium hydroxide (KOH).

- Arrester, distribution, heavy duty class : Distribution arrester (heavy duty class) is described as a arrester normally used to protect overhead distribution systems exposed to severe lightning currents.