ῥιζοφάγος
From LSJ
τί ἦ μοι ταῦτα περὶ δρῦν ἢ περὶ πέτρην → but what is this to me, about an oak or a rock | but what are these things about a tree or a rock to me | why all this about trees and rocks | why all this about what we have nothing to do with | but why am I off on this tangent
English (LSJ)
(parox.), ον,
A eating roots, Arist.HA595a16, PA662b14; οἱ Ῥ. Root-eaters, name of an Ethiopian tribe in D.S.3.23, Str.16.4.9.
German (Pape)
[Seite 843] Wurzeln essend; Arist. H. A. 8, 6 part. an. 3, 1; D. Sic. 3, 23.