νεφεληδόν
From LSJ
ἐξ ὀνύχων λέοντα τεκμαίρεσθαι → judge by the claws, judge by a slight but characteristic mark, small traits give the clue to the character of a person, deduce something from a small indication, identify a lion from its claws
English (LSJ)
Adv.
A in the manner of clouds, Nonn.D.15.1.
Greek (Liddell-Scott)
νεφεληδόν: Ἐπίρρ., ὡς αἱ νεφέλαι, κατὰ τὸν τρόπον τῶν νεφελῶν, Νόνν. Δ. 15. 1.