1.1 This terminology document defines terms commonly used in standards developed by ASTM Subcommittee E50.47 on Biological Effects and Environmental Fate. This terminology document is intended to be consistent with the use of terms in ASTM standards related to this field and, to the extent possible, with use by other organizations.

1.1.1 If a specific Subcommittee E50.47 standard uses one of these terms in a different context, then the term should be defined in that standard. A term used only in a specific ASTM standard need not be included in this terminology document.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.