A dipleidoscope is an instrument used to determine true noon. It consists of a small telescope and a prism that creates a double image of the sun.
dipleidoscope:
Ancient Greek
古希腊语
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。