From the
Glossary of The Wheel of Time
A
stylized mark, usually black, in the shape of a
teardrop balanced on it's
point. Scrawled on the door of a house, it is an
accusation of evil against the people inside. It's opposite number is the
Flame of Tar Valon. When the two are combined, they form the ancient symbol of the
Aes Sedai.