coelostat

英[\'si:l?st?t]
美[\'s?l??st?t]

基本釋義

n.
定天鏡(觀測(cè)或拍攝天體時(shí)鏡面與地軸一同轉(zhuǎn)動(dòng)可使圖像固定不動(dòng))

英英釋義

Noun
  • 1. optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror

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