περίμετρον
From LSJ
ἐπὶ ξυροῦ γὰρ ἀκμῆς ἔχεται ἡμῖν τὰ πρήγματα → our affairs are balanced on a razor's edge, our affairs are set upon the razor's edge
English (LSJ)
τό,
A circumference, Hdt.1.185, 2.15,41, Arist.Mir.840b34, Luc.VH2.40 ; τὸ π. τῆς περιόδου Hdt.2.149 ; τὸ π. τῆς γῆς Ach.Tat.Intr.Arat. 29.
German (Pape)
[Seite 583] τό, = ἡ περίμετρος, Umkreis; Her. 1, 185 u. öfter; Ath. XII, 541 e.