ξυστρίδα

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

Source

Greek Monolingual

η (Α ξυστρίς, -ίδος)
ξύστρα, στλεγγίδα.
[ΕΤΥΜΟΛ. < ξύστρα + κατάλ. -ίς, -ίδος (πρβλ. ημερίς)].