The document defines the terms and definitions related to the natural rubber industry, which are applicable to natural rubber and related fields. No normative documents are quoted in the document. In the terminology and definitions section, the category and source of rubber are clarified, including the definitions of polymers, resilience bodies, rubber, etc. Different definitions of rubber are explained, indicating that it may be used as end point materials, raw materials or intermediate materials. At the same time, in the definition of rubber hydrocarbons, its characteristics of carbon and hydrogen are emphasized, especially for natural rubber. Rubber hydrocarbons are chemically pure polyisoprene that removes components such as proteins and lipids.