the fixed lower member of a pair of millstones.Compare runner(def 12).
Origin of bed stone
First recorded in 1715–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for bed stone
Historical Examples of bed stone
It was made of two circular stones, the lowest of which was called the bed-stone, the upper one the runner.Life & Times of Col. Daniel Boone
Cecil B. Hartley