What does the word nostril mean?

Usage examples for nostril

  1. She began to feel quite certain that Ward would be surprised and disgusted when he found her there, and would look at her with that faint curl of the lip and that fainter lift of the nostril above it, which made her go hot all over with the scorn in them. – The Ranch at the Wolverine by B. M. Bower
  2. And there lay the steed with his nostril all wide, But through it there rolled not the breath of his pride; And the foam of his gasping lay white on the turf, And cold as the spray of the rock- beating surf. – The American Union Speaker by John D. Philbrick