caucho

Natural rubber is an elastic hydrocarbon polymer that naturally occurs as a milky colloidal suspension, or latex, in the sap of some plants. It can also be synthesized. The entropy model of rubber was developed in 1934 by Werner Kuhn.
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n. rubber, caoutchouc, elastic material derived from of some tropical plants

v. tap rubber trees, pierce in order to release a fluid (Andes)

= gum, rubber.
Ex: These plates can be stored and used again time after time provided they are wiped over with a gum solution after each use to prevent oxydization.
Ex: In time, however, the rubber on which these gurta percha (or caoutchouc) bindings depended perished, and the leaves fell out.
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* mantilla de caucho = rubber blanket.
* sello de caucho = rubber date stamp, rubber stamp.