ὄρειον
From LSJ
ὀψὲ θεῶν ἀλέουσι μύλοι, ἀλέουσι δὲ λεπτά → the millstones of the gods grind late, but they grind fine | the mills of God grind slowly, but they grind exceedingly small
English (LSJ)
τό, = πολύγονον θῆλυ, mare's tail, Hippuris vulgaris, Plin. HN27.115. ὀρείονες, v. ὀρεᾶνες.