What does the word deleterious mean?

Usage examples for deleterious

  1. Besides green- vitriol, it is possible that certain organic salts of iron, may be deleterious. – Peat and its Uses as Fertilizer and Fuel by Samuel William Johnson
  2. The horn is often exposed to the vicious influences of unsuitable litter, the application of unsuitable dressings, and the deleterious effects of the street mud of our cities. – Diseases of the Horse's Foot by Harry Caulton Reeks
  3. But the effect on the nerves was deleterious. – The Old Wives' Tale by Arnold Bennett