first finger
US /ˈfɜːrst ˈfɪŋ.ɡər/
UK /ˈfɜːrst ˈfɪŋ.ɡər/

1.
indice
the finger next to the thumb; the index finger
:
•
Point with your first finger to show me where it is.
Indica con il tuo indice per mostrarmi dov'è.
•
She wore a ring on her first finger.
Indossava un anello al suo indice.