Lydian stone

English

Noun

Lydian stone (plural Lydian stones)

1. A flint slate used by the ancients to try gold and silver; a touchstone.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “Lydian stone”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)