περί-μετρον, τό,
circumference, [[ 5th c.BC: Herodotus Historicus 1.185, 2.15, 41, 4th c.BC: Aristoteles Philosophus “Mirabilia” 840b34, 2nd c.AD: Lucianus Sophista “VH” 2.40; τὸ π. τῆς περιόδου 5th c.BC: Herodotus Historicus 2.149; τὸ π. τῆς γῆς 3rd c.AD(?): Achilles Tatius Astronomus “Introductio in Aratum” 29. ] Refs 5th c.BC+]