The terms used in these guidelines are defined below. The terms and their definitions have been selected and adapted from other WHO documents and guidelines that are widely used by WHO Member States. The citation numbers in parentheses following a term refer to the publications, listed in the References below, from which that term has been derived. The footnotes in this section refer to recommendations on the terminology made by the participants in the WHO Consultation on Good Agricultural and Field Collection Practices for Medicinal Plants (Geneva, 7-9 July 2003) for consideration when those documents and guidelines are updated.