Definition of buhrstone in English:

buhrstone

noun

(also burstone)
  • A porous limestone formerly much used for millstones.

    • ‘The buhrstone flint (Carlson's type 5) is not included in DeRegnaucourt and Georgiady's typology.’

Pronunciation

buhrstone

/ˈbərstōn/ /ˈbərstoʊn/