Pesticide means any substance or mixture of substances intended for preventing, destroying, repelling, or mitigating any pest, or intended for use as a plant regulator, defoliant, or desiccant, other than any article that:
(1) Is a new animal drug under FFDCA sec. 201(w), or
(2) Is an animal drug that has been determined by regulation of the Secretary of Health and Human Services not to be a new animal drug, or
(3) Is an animal feed under FFDCA sec. 201(x) that bears or contains any substances described by paragraph (s) (1) or (2) of this section.
40 CFR § 152.3
Terms used in this part have the same meaning as in the Act. In addition, the following terms have the meanings set forth in this section.