perpent

[pur-puh nt] /ˈpɜr pənt/
noun
1.
perpend1 .
British Dictionary definitions for perpent

perpend1

/ˈpɜːpənd/
noun
1.
a large stone that passes through a wall from one side to the other Also called parpend, perpend stone
Word Origin
C15: from Old French parpain, of uncertain origin