lewisson

[loo-i-suh n] /ˈlu ɪ sən/
noun
1.
British Dictionary definitions for lewisson

lewis

/ˈluːɪs/
noun
1.
a lifting device for heavy stone or concrete blocks consisting of a number of curved pieces of metal or wedges fitting into a dovetailed recess cut into the block
Word Origin
C18: perhaps from the name of the inventor