• 爻こう

  yao (line representing yin or yang that comprises one third of a trigram)

• 爻辞こうじ

  commentary (on any of the 384 lines of the hexagrams in the Book of Changes)

• 陽爻ようこう

  yang yao (unbroken line composing one third of a trigram)

• 陰爻いんこう

  yin yao (broken line composing one third of a trigram)