προτέρας (proteras)
προτέρας is an Ancient Greek form of πρότερος, meaning “earlier, former; before”. It is the genitive singular feminine adjective.
Found 157 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 3.49.2: καὶ τριήρη εὐθὺς ἄλλην ἀπέστελλον κατὰ σπουδήν, ὅπως μὴ φθασάσης τῆς προτέρας εὕρωσι διεφθαρμένην τὴν πόλιν· προεῖχε δὲ ἡμέρᾳ καὶ νυκτὶ μάλιστα.
All forms of πρότερος (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.