<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31398020</termId><termName>sandglasses</termName><termType>PT</termType><termNote><![CDATA[ Timepieces that measure equal periods of time by the motion of sand or other freely flowing, fine-grained substances through a narrow aperture between two triangular or conical glass bulbs arranged mouth to mouth; probably introduced in the early 14th century and used then especially for timekeeping aboard ships. ]]></termNote><termCreatedDate>2026-03-30 20:47:01</termCreatedDate><relation><relationType>UF</relationType><termId>31398021</termId><termName>sand glasses</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31398022</termId><termName>sand-glasses</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31398023</termId><termName>sandglass</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31398024</termId><termName>time glasses</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31358230</termId><termName>timepieces by form</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31427953</termId><termName>hourglasses</termName><termType>PT</termType></relation></term>  </Zthes>