ἀντίχειρος
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
Spanish (DGE)
-ου, ὁ pulgar ὁ ἀντίχειρος δάκτυλος Antyll. en Orib.7.9.8
•como medida pulgada Hero Geom.192.7.