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Found 1 definition: gregorian telescope.

gregorian telescope top

Pos: Noun Phrase
[WORDNET DICTIONARY]

Noun gregorian telescope has 1 senses

   gregorian telescope(n = noun.artifact) cassegrainian telescope - 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;
is a kind of reflecting telescope, reflector


[OXFORD DICTIONARY]

gregorian telescope, n. a reflecting telescope in which light reflected from a secondary mirror passes through a hole in a primary mirror.

Etymology:
J. Gregory, Sc. mathematician d. 1675, who devised it


[RELATED WORDS]

astronomical telescope, cassegrainian telescope, coude telescope, galilean telescope, gregorian, gregorian calendar, gregorian calendar month, gregorian chant, gregorian mode, herschelian telescope, hubble space telescope, hubble telescope, maksutov telescope, newtonian telescope, optical telescope, radio telescope, reflecting telescope, refracting telescope, schmidt telescope, solar telescope, telescope, telescope bag, telescope sight, water telescope