In agriculture, a plowshare (US) or ploughshare (UK; /ˈplaʊʃɛər/) is a component of a plow (or plough).

Why is it called a plowshare?

There are many types of plows, including mechanical plows, riding plows, and handheld blows, but the blade of all of them can be called a plowshare. This word is part of a famous proverb about "beating swords into plowshares," which means to move from war to peace. Plowshare is often spelled ploughshare.

What is a plowshare in the Bible?

Swords to ploughshares (or plowshares) is a concept in which military weapons or technologies are converted for peaceful civilian applications. ... In addition to the original Biblical Messianic intent, the expression "beat swords into ploughshares" has been used by disparate social and political groups.