What does the word arc mean?

Usage examples for arc

  1. It was bred, therefore, to arc. – Sex-linked Inheritance in Drosophila by Thomas Hunt Morgan Calvin B. Bridges
  2. Pariset instantly replied, working the gun in a long arc from left to right. – A Hero of Liége by Herbert Strang
  3. He was looking steadily at Aiken and his eyes were shining like two arc lamps. – Captain Macklin by Richard Harding Davis