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1. Oxford American Dictionary

   Gregorian telescope

   • IPA[ɡrəˈɡôrēən ˈteləˌskōp]

   • n.
     an early reflecting telescope in which light reflected from a concave elliptical secondary mirror passes through a hole in the primary mirror. It was rendered obsolete by the introduction of Newtonian and Cassegrain telescopes.

   • noun: Gregorian telescope, plural noun: Gregorian telescopes

2. • 相關詞

   Gregorian calendar

   • n.
     the calendar introduced in 1582 by Pope Gregory XIII, as a modification of the Julian calendar.

   Oxford Dictionary

   Gregorian chant

   • n.
     church music sung as a single vocal line in free rhythm and a restricted scale (plainsong), in ...

   Oxford American Dictionary

   Gregorian chant

   • n.
     church music sung as a single vocal line in free rhythm and a restricted scale (plainsong), in ...

   Oxford Dictionary

   Gregorian calendar

   • n.
     the calendar introduced in 1582 by Pope Gregory XIII, as a modification of the Julian calendar.

   Oxford American Dictionary

3. • 更多解釋

   Gregorian telescope

   • IPA[ɡrɪˈɡɔːrɪən]

   英式

   • n.
     an early reflecting telescope in which light reflected from a concave elliptical secondary ...

   Oxford Dictionary