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OXFORD DICTIONARY
gregorian | gregorian calendar | gregorian calendar month | gregorian chant | gregorian mode | gregorian telescope | gregory | gregory goodwin pincus | gregory i | gregory john norman | gregory nazianzen

gregorian telescope

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Noun Phrase
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Gre=go=ri=an tel=e=scope

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

For further exploring for "gregorian telescope" in Webster Dictionary Online


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