What does the word quicksilver mean?

Usage examples for quicksilver

  1. I had been sitting there, drinking in the beautiful music made by the world- famous Constabulary Band, and watching the quicksilver- like changing colors of the sunset. – Flash-lights from the Seven Seas by William L. Stidger Commentator: Bishop Francis J. McConnell
  2. Quirk, Gammon, and Snap, accompanied by Mr. Mortmain, whom they had brought down to watch the case, made their appearance shortly after Mr. Quicksilver and Mr. Lynx. – Ten Thousand a-Year. Volume 1. by Samuel Warren
  3. Hughes B. 1. Quicksilver Window. – The Best Short Stories of 1921 and the Yearbook of the American Short Story by Various