- AdsorptionThe mechanism whereby ions or compounds within a liquid or gas adhere to a solid surface upon contact. The term also refers to a method of treating wastes in which activated carbon is used to remove organic compounds from wastewater.
- AFCEEAir Force Center for Engineering and the Environment AMA American Management Association
- AnionA negatively charged ion.
- Arithmetic meanThe sum of a collection of numbers divided by the number of numbers in the collection, commonly referred to as the “average”.