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单词 alidade
释义

alidad /alˈi-dad or a-li-dadˈ/ or alidade /-dād/ (surveying)

noun

A revolving index for reading the graduations of an astrolabe, quadrant, or similar instrument, or for taking the direction of objects

ORIGIN: Ar al ʻidādah the revolving radius, from ʻadid humerus
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更新时间:2024/11/10 10:43:42