astronomus
From LSJ
πέτρην κοιλαίνει ρανὶς ὕδατος ἐνδελεχείῃ → constant dropping wears away a stone, constant dripping will wear away the hardest stone, little strokes fell big oaks, constant dripping wears the stone, constant dropping wears the stone, constant dripping will wear away a stone
Latin > English (Lewis & Short)
astrŏnŏmus: i, m., = ἀστρονόμος,
I an astronomer (for the earlier astrologus, q. v.), Firm. Math. 5, 13.