κάστωρ
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
ορος, ὁ,
A beaver, Castor fiber, Hdt.4.109, Arist.HA594b31, Hierocl.p.17 A., Ael.NA6.34. II = καστόρειον, Hp.Mul.2.157, Aret.CA2.10. III = κρόκος, Ps.-Dsc.1.26.