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astrograph

[as-truh-graf, -grahf]
noun
  1. a navigational device for projecting altitude curves of the stars and planets onto charts or plotting sheets.
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Origin of astrograph

Related formsas·tro·graph·ic [as-truh-graf-ik] /ˌæs trəˈgræf ɪk/, adjectiveas·trog·ra·phy [uh-strog-ruh-fee] /əˈstrɒg rə fi/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018