(1) “Adjuvant” means any substance that, when added to a pesticide, is intended to aid, modify or enhance its effectiveness by its properties of serving as a wetting agent, detergent, spreading agent, synergist, deposit builder, adhesive, surfactant, emulsifying agent, deflocculating agent, water modifier, or similar agent, with or without toxic properties of its own, and when sold in a package or container separate from that of the pesticide with which it is to be used;

(2) “Aircraft” means any contrivance known or hereafter invented that is used or designed for navigation of or flight in the air over land or water and is designed or adaptable for use in applying pesticides in any form;

(3) “Commercial aerial applicator” means any person who engages in the application of pesticides by aircraft;

(4) “Commissioner” means the commissioner of agriculture, or the commissioner's authorized agent;

(5) “Custom application of pesticides” means any application of pesticides for hire;

(6) “Department” means the department of agriculture;

(7) “Licensee” means any person duly licensed under this part;

(8) “Person” means any individual, partnership, firm, corporation, company, trust, association, or other legal entity;

(9) “Pesticide” means any substance or mixture of substances, or chemical intended for defoliating or desiccating plants, or for preventing, destroying, repelling, or mitigating any insects, rodents, fungi, bacteria, weeds, or other form of plant or animal life the commissioner declares to be a pest. This includes, but is not limited to, insecticide, fungicide, bactericide, herbicide, desiccant, defoliant, adjuvant or nematocide;

(10) “Pilot” means any person flying an aircraft; and

(11) “Restricted use pesticide” means a pesticide that the commissioner has so designated by regulation under the Tennessee Insecticide, Fungicide and Rodenticide Act, compiled in parts 1 and 2 of this chapter.