<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31402776</termId><termName>pyramids</termName><termType>PT</termType><termNote><![CDATA[ Polyhedrons having one face (the base) that is a polygon of any number of sides, and the other faces are triangles with bases forming the sides of the polygon meet at a common vertex. ]]></termNote><termCreatedDate>2026-03-30 20:48:19</termCreatedDate><relation><relationType>UF</relationType><termId>31402777</termId><termName>pyramid</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31361622</termId><termName>polyhedra</termName><termType>PT</termType></relation></term>  </Zthes>