gutta-percha
noun
gut·ta-per·cha ˌgə-tə-ˈpər-chə 
: a tough plastic substance from the latex of several Malaysian trees (especially Palaquium gutta) of the sapodilla family that resembles rubber but contains more resin and is used especially as insulation and in dentistry as a permanent filling in root canals
Word History
Etymology
Malay gĕtah-pĕrcha, from gĕtah sap, latex + pĕrcha scrap, rag
First Known Use
1845, in the meaning defined above
Medical Definition
gutta-percha
noun
gut·ta-per·cha ˌgət-ə-ˈpər-chə
: a tough plastic substance from the latex of several Malaysian trees (genera Payena and Palaquium) of the sapodilla family (Sapotaceae) that resembles rubber but contains more resin and is used in dentistry especially as a permanent filling in root canals