ἰδέαι (ideai)
ἰδέαι is an Ancient Greek form of ἰδέα, meaning “form, shape”. It is the nominative plural feminine noun.
Found 61 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.109.1: οἱ δ’ ἐν τῇ Αἰγύπτῳ Ἀθηναῖοι καὶ οἱ ξύμμαχοι ἐπέμενον, καὶ αὐτοῖς πολλαὶ ἰδέαι πολέμων κατέστησαν.
All forms of ἰδέα (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.