index finger
US /ˈɪn.deks ˌfɪŋ.ɡər/
UK /ˈɪn.deks ˌfɪŋ.ɡər/

1.
dedo indicador
the finger next to the thumb; the forefinger
:
•
He pointed with his index finger.
Ele apontou com o dedo indicador.
•
She held up her index finger to signal 'one moment'.
Ela levantou o dedo indicador para sinalizar 'um momento'.