中指(なかゆび)middle finger, long finger, second finger, tall finger, middle toe, third toe

中指(なかゆび)は真(ま)ん中(なか)の指(ゆび)です。

The middle finger is the finger in the center. {middle finger, long finger, second finger, tall finger, middle toe, third toe}

先生(せんせい)：「中指(なかゆび)を立(た)ててはいけません。」

Teacher: 'You must not raise your middle finger.' {middle finger, long finger, second finger, tall finger, middle toe, third toe}

手(て)の中指(なかゆび)は、五本(ごほん)の指(ゆび)の中(なか)で一番(いちばん)長(なが)い指(ゆび)である。

The middle finger is the longest of the five fingers on the hand. {middle finger, long finger, second finger, tall finger, middle toe, third toe}

中指(なかゆび)でも人差(ひとさ)し指(ゆび)でも、付(つ)けたい指(ゆび)に指輪(ゆびわ)をつけるべきです。

Whether it's the middle finger or the index finger, you should put the ring on the finger you want to. {middle finger, long finger, second finger, tall finger, middle toe, third toe}

父親(ちちおや)：「いいかい？どんな時(とき)も決(けっ)して人(ひと)に向(む)かって中指(なかゆび)を立(た)ててはならぬ。」

Father: 'Understand? You must never give someone the middle finger, no matter what.' {middle finger, long finger, second finger, tall finger, middle toe, third toe}