Yang  The active male force or principal in nature whose manifestations are opposite and complimentary to those of Yin in their joint replication of the universe.

Yggdrasil-(eg'g. dra.sil) The Norse tree which held up the world and the heavens; its roots led to the underworld. It provided the complex network of the universe.

Yin  The passive; the female force or principal in nature.

Yoni (yOO-nEE)  The symbol of the female's external reproductive parts.

Yule- The Winter Solstice festival, December 22.

Yule Log- The traditional log burned at Christmas ceremonies which most likely came from a pagan tradition for Yule celebration.