<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31361601</termId><termName>ellipses</termName><termType>PT</termType><termNote><![CDATA[ Geometric plane figures produced when a cone is cut obliquely by a plane taking a smaller angle with the base than the side of the cone makes with the base; the form is symmetric about its horizontal and vertical axes. ]]></termNote><termCreatedDate>2026-03-30 20:37:33</termCreatedDate><relation><relationType>UF</relationType><termId>31361602</termId><termName>ellipse</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31327319</termId><termName>plane figures</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31333750</termId><termName>oval</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31333752</termId><termName>elliptical</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31333777</termId><termName>ellipsoid</termName><termType>PT</termType></relation></term>  </Zthes>