gnomon
From LSJ
Τὶ δὲ σὺ διά τὸν Θεὸν δύνασαι ἀρνηθῆναι; Οἷον δὲ μέτρον ἀγάπης τῶν ἀγαπώντων σε ἐστί; (Χρύσανθος Καταπόδης, Σχολὴ Ζωῆς) → ?
gnōmon: ŏnis, m., = γνώμων>,
I the pin or style of a sundial, the gnomon, Plin. 2, 72, 74, § 182; Vitr. 1, 6; 9, 8; Mart. Cap. 6, 194.