Definition of astrograph in English:

astrograph

Pronunciation /ˈastrə(ʊ)ɡrɑːf/ /ˈastrə(ʊ)ɡraf/

noun

  • 1Astronomy
    A device for determining the positions of stars; especially a telescope used for photographing the night sky, specifically one using wide-angle photographs to detect celestial objects or to determine their position.

  • 2Aeronautics Nautical
    historical A navigational device that projects a set of curves of equal altitude for a given star on to a navigational chart or plotting sheet.

Origin

Mid 19th century; earliest use found in The Literary Gazette. From astro- + -graph.