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lewis bolt[′lü·əs ‚bōlt]
A bolt with an enlarged, tapered head that is inserted into masonry or stone and fixed with lead; used as a foundation bolt.
1. A bolt with a wedge-shaped end inserted like the shank of a lewis in a hole drilled in a stone and fastened therein by pouring melted lead or concrete into the unfilled part of the hole.
2. An eyebolt similarly inserted and used like a lewis for lifting heavy stones.