πεντεκαιδεκάχορδος
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)
[ᾰ], ον,
A with fifteen strings, Adrast. ap. Theon. Sm. p.64 H., Ptol.Harm. 3.1 tit., Porph. in Harm. p.168 D.
Greek (Liddell-Scott)
πεντεκαιδεκάχορδος: -ον, ὁ ἀποτελούμενος ἐκ δεκαπέντε χορδῶν, Θέων Σμυρν. σ. 98.