astrograph

astrograph [as-truh-graf, -grahf] Word Origin noun

1. a navigational device for projecting altitude curves of the stars and planets onto charts or plotting sheets.

Origin of astrograph astro- + -graph Related formsas·tro·graph·ic [as-truh-graf-ik] /ˌæs trəˈgræf ɪk/, adjectiveas·trog·ra·phy [uh-strog-ruh-fee] /əˈstrɒg rə fi/, noun