οὐραῖον

From LSJ

ὀφθαλμοὶ γὰρ τῶν ὤτων ἀκριβέστεροι μάρτυρες → the eyes are more accurate witnesses than the ears, the eyes are more exact witnesses than the ears

Source

Russian (Dvoretsky)

οὐραῖον: τό
1 хвост (κυνός Men.);
2 хвостовой плавник или рыбий хвост Arst.