λευκάνθεμον
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 white-flower, like χρυσάνθεμον, name of several plants of the genus Anthemis, Dsc.3.137, Plin.HN21.163:— also λευκ-ανθεμίς, ίδος, ἡ, ib.22.53.