(1) Agricultural product 
The term agricultural product means any fresh fruit or vegetable or any commodity or product derived from livestock or fowl, that is marketed in the United States for human consumption.

(2) Certificate 
The term certificate means a certificate of accreditation issued under this chapter.

(3) Laboratory 
The term laboratory means any facility or vehicle that is owned by an individual or a public or private entity and is equipped and operated for the purpose of carrying out pesticide residue analysis on agricultural products for commercial purposes.

(4) Pesticide 
The term pesticide means any substance that alone, in chemical combination, or in any formulation with one or more substances, is defined as a pesticide in section 136 (u) of this title.

(5) Secretary 
The term Secretary means the Secretary of Agriculture.