Henry George Liddell, Robert Scott, An Intermediate Greek-English Lexicon

I.originally a tree (which indeed comes from the same Root), commonly the oak, Lat. quercus, Hom., etc.; sacred to Zeus, who gave his oracles from the oaks of Dodona, Od.;—hence, αἱ προσήγοροι δρύες Aesch.:—proverb., οὐ γὰρ ἀπὸ δρυός ἐσσι οὐδ᾽ ἀπὸ πέτρης thou art no foundling from tree or rock, i. e. thou hast parents and a country, Od.; οὐ νῦν ἐστιν ἀπὸ δρυὸς οὐδ᾽ ἀπὸ πέτρης ὀαρίζειν 'tis no time now to talk at ease from tree or rock, Il.

II.of other trees, πίειρα δρῦς the resinous wood (of the pine), Soph.; of the olive, Eur.

III.metaph. a wornout old man, Anth.