- a form of reflecting astronomical telescope with a concave ellipsoidal secondary mirror and the eyepiece set behind the centre of the parabolic primary mirror
| 单词 | gregorian telescope |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 Grego′rian tel′escope,
Collins Concise English Dictionary © HarperCollins Publishers:: Gregorian telescope n
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