As used in this chapter, the term:

(1) "Adulterant" means a substance used as an addition to another substance for falsification or adulteration.

(2) "Adulteration" means an addition of an impure, cheap, or unnecessary ingredient to cheat, cheapen, or falsify a preparation.

(3) "Biologicals" means medicinal preparations made from living organisms and their products, including serums, vaccines, antigens, and antitoxins which are for use on poultry and animals, excluding humans.

(4) "Contaminant" means something that causes contamination, such as a foreign organism developing accidentally in a pure culture.

(5) "Contamination" means the soiling or making inferior by contact or mixing.