\Lyd"i*an\, a. [L. Lydius, fr. Lydia, Gr. ?.]
Of or 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, or voluptuous character.
      Softly sweet in Lydian measures, Soon he soothed his
      soul to pleasures.                       --Dryden.
{Lydian stone}, a flint slate used by the ancients to try
   gold and silver; a touchstone. See {Basanite}.