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| Cas·se·grain·ian tel·e·scope [ kassə gràynee ən téllə skp ] (plural Cas·se·grain·ian tel·e·scopes) |
noun |
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| Definition: |
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astronomical telescope: an astronomical telescope that uses a large concave mirror and a small convex mirror to form an image
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| [Late 19th century. After Giovanni Cassegrain (1625-1712), French astronomer] |
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