Definition: Acetiam refers to a substance made from acetone, a liquid organic compound with properties similar to but different from ethanol (ethenol). Acetamine is an amide acid that forms the base for enzymes used in many applications such as medicine, agriculture, and biochemistry. The word comes from Ancient Greek "acetia" which means "a substance containing alcohol." Definition: A substance made from acetone, a liquid organic compound with properties similar to but different from ethanol (ethenol). It is the base for enzymes used in medicine, agriculture, and biochemistry.