ploughshare
/ˈplaʊʃɛː
/(US plowshare)
noun
The main cutting blade of a plough, behind the coulter.Heavier plows with wheels, horizontal plowshares, and a moldboard were invented, which cut down on manual labor....
- Each day I must yoke the oxen and fasten the ploughshare to the plough.
- The Shearer brothers produced cast-iron ploughshares and from 1888 onwards wrought steel ploughshares.
Origin
Late Middle English: from plough + Old English scær, scear 'ploughshare' (related to shear).