Lȳd'i-an, a.

a. [Lat. Lydius, from Lydia, from Gr. Λυδία.] Pertaining to Lydia, a country of Asia Minor, or to its inhabitants; hence, soft; effeminate; — said especially of one of the ancient Greek modes or keys, the music in which was of a soft, pathetic character.

Lydian stone, a flint slate used by the ancients to try gold and silver; a touchstone.