D defs.my
Entry 1 sense Webster, 1913

Lydian

· Lyd·i·an · IPA /ˈlɪ.di.ən/
01 a. Of or pertaining to Lydia, a country of Asia Minor, or to its inhabitants; hence, soft; effeminate; -- said especially of one of the ancien…
  1. 1.
    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.
Phrases & compounds
Lydian stone — a flint slate used by the ancients to try gold and silver; a touchstone. See Basanite.