Lydian

Lydian may refer to:
 * Lydians, an ancient people of Anatolia
 * Lydian language, an ancient Anatolian language
 * Lydian alphabet
 * Lydian (Unicode block)
 * Lydian (typeface), a decorative typeface
 * Lydian dominant scale or acoustic scale, a musical scale
 * Lydian mode, a mode derived from ancient Greek music