Emily Dickinson Lexicon

AS-TROL'O-GER, or AS-TRO-LO'GI-AN, n. [L. astrologus, of αστρον, a star, and λογος, discourse.]

1. One who professes to foretell future events by the aspects and situation of the stars. Astrologian is little used. – Wotton.
2. Formerly one who understood the motions of the planets, without predicting. – Raleigh.