noun The process of hardening into a stone substance.
noun A stony concretion.
noun ↑ Walker, John (1791), “Lapidescence”, in A Critical Pronouncing Dictionary […] , London: G. G. J. and J. Robinſon […] and T. Cadell, →OCLC, page 318.
noun ↑ “lapidescence”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.