What does the word residuum mean?

Usage examples for residuum

  1. It is produced, first, from gas coal distilled in gas retorts; second, from gas or ordinary bituminous coals burned in special furnaces called coke ovens; and third, from petroleum by carrying the distillation of the residuum to a red heat. – Steam, Its Generation and Use by Babcock & Wilcox Co.
  2. Take away these doctrines, and there will be left indeed a residuum of ethical teaching, which some may please to call Christianity if they will; but it differs as widely from what countless thousands have understood and still understand by the term, as a corpse differs from a living man. – The English Church in the Eighteenth Century by Charles J. Abbey and John H. Overton
  3. She had reason to hope that he would use his great position to great ends, for the residuum of all her turbid and agitating thoughts about him was an admiration for the man in his attitude toward the world, no matter how much she still resented his attitude toward herself. – A Manifest Destiny by Julia Magruder