ἐπιγονατίς
From LSJ
ἡ Νέμεσις προλέγει τῷ πήχεϊ τῷ τε χαλινῷ μήτ' ἄμετρόν τι ποιεῖν μήτ' ἀχάλινα λέγειν → Nemesis warns us by her cubit-rule and bridle neither to do anything without measure nor to be unbridled in our speech
English (LSJ)
ίδος, ἡ,
A knee-pan, Ruf. ap. Orib.25.1.50, Sor.1.103, Gal. 2.303; cf. ἐπιγουνατίς. II. garment reaching to the knee, Paus. Gr.Fr.144.