ploughshares

noun
  1. The cutting blade or point of a plough that turns over the soil.
  2. Usage: Plural form of ploughshare; Also spelled 'plowshare' in U.S. English
  3. A symbol of peace and agricultural work, often used in the phrase 'beat swords into ploughshares' (from the Bible).
  4. Usage: Figurative or symbolic use

Examples