This standard defines terms used in the plastics industry. When a term has one or more synonyms, the synonymous term follows the preferred term. This in turn details synonyms in correct alphabetical order. Deprecated terms are indicated with "Deprecated". Where a definition may not be found or indicated, the term is followed by the symbol →. The abbreviation "cf." (cf.) indicates that the user can refer to other terms (not synonyms), definitions or note the information contained in the term with the following symbols.