heliometer
英 [hi:lɪ'ɒmɪtə] 美 [ˌhili'ɒmɪtə]

n.

太阳仪；测日仪；

英英释义

heliometer[ ,hi:li'ɔmitə ]

• n.an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope

权威例句

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