| NOUN | artifact | Gregorian telescope, Cassegrainian telescope | a reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror |
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| Meaning | A reflecting telescope that has a paraboloidal primary mirror and a hyperboloidal secondary mirror; light is brought to a focus through an aperture in the center of the primary mirror. | |
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| Synonym | Cassegrainian telescope | |
| Broader | reflecting telescope, reflector | optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece |
| Spanish | telescopio gregoriano | |
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