Definition of orthian in US English:

orthian

adjective

Ancient Greek Music
  • Designating a style of singing of very high pitch, or a song sung in this style.

Origin

Late 16th century; earliest use found in George Chapman (?1560–1634), poet and playwright. From ancient Greek ὄρθιος high-pitched, upright + -an.

Pronunciation

orthian

/ˈɔːθɪən/