πέτρης (petres)
πέτρης is an Ancient Greek form of πέτρα, meaning “rock, cliff”. It is the genitive singular feminine noun.
Found 71 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 1.880: πέτρης ἐκχύμεναι σιμβληίδος, ἀμφὶ δὲ λειμὼν
All forms of πέτρα (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.