Gregorian telescope


noun
  1. a telescope similar in design to the Cassegrainian telescope but less widely used.

Origin of Gregorian telescope

1
1755–65; named after James Gregory; see -ian

Words Nearby Gregorian telescope

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British Dictionary definitions for Gregorian telescope

Gregorian telescope

noun
  1. a form of reflecting astronomical telescope with a concave ellipsoidal secondary mirror and the eyepiece set behind the centre of the parabolic primary mirror

Origin of Gregorian telescope

1
C18: named after J. Gregory (died 1675), Scottish mathematician who invented it

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