Ἀρκτοῦρος
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
ὁ, (οὖρος
A guard) the star Arcturus, Bearward (v. ἄρκτος 1.2), Hes.Op.566,610, Anaxag.20, etc. II the time of his heliacal rising, i.e. the middle of September, Hp.Aër.10, S.OT1137; τὴν ὥραν τὴν τοῦ τρυγᾶν Ἀρκτούρῳ σύνδρομον Pl.Lg.844e (cf. Τρυγητής) Ἀρκτούρου ἐπιτολαί Th.2.78, etc.