πέτρος, ὁ (in later Poets ἡ, [
Refs 3rd c.BC+],
stone (distinguished from πέτρα, which see); in [
Refs 8th c.BC+], used by warriors, λάζετο πέτρον μάρμαρον ὀκριόεντα [
Refs 8th c.BC+]; ἐν πέτροισι πέτρον ἐκτρίβων, to produce fire, [
Refs 5th c.BC+]; of a
boulder forming a landmark, [
Refs 3rd c.BC+]
2) proverbial, πάντα κινῆσαι πέτρον 'leave no stone unturned', [
Refs 5th c.BC+]; of imperturbability, καὶ γὰρ ἂν πέτρου φύσιν σύ γ᾽ ὀργάνειας [
Refs 5th c.BC+]
II) a kind of
reed, [
Refs] —The usual Prose word is λίθος.