<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31303889</termId><termName>plastic</termName><termType>PT</termType><termNote><![CDATA[ A general term for any of a large and varied class of natural or synthetic organic materials that can be molded, extruded, or cast when soft or liquid, and then set into a rigid or slightly elastic form. Natural plastics include tree resins, beeswax, gutta-percha, horn, and clay. Synthetic plastics were first made in the 19th century. Plastics are used widely in manufacturing. ]]></termNote><termCreatedDate>2026-03-30 20:21:43</termCreatedDate><relation><relationType>UF</relationType><termId>31303890</termId><termName>plastics</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298623</termId><termName>organic material</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316725</termId><termName>[plastic by composition or origin]</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316726</termId><termName>[plastic by production method]</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316727</termId><termName>[plastic by form]</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316728</termId><termName>[plastic by property]</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316729</termId><termName>[plastic by function]</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31327959</termId><termName>plastic arts</termName><termType>PT</termType></relation></term>  </Zthes>