Perhaps a subjective remark, but one that will be accompanied with factual information.
The Aes Sedai symbol resembles a lot to the Yin-Yang symbol of Taoism, but without the colour alternating dots. Coincidentally, one of the concepts that the Yin Yang represents is the unity between male and female, where the female represents Yin (the black part) and the male represents Yang (the white part). The White part of the Aes Sedai symbol represents Saidar (the female Aes Sedai part), while the black part is the Saidin, the male Aes Sedai part that is tainted by the Dark One.
Aes Sedai is pronounced EYEZ seh-DEYE, but I'm sure anybody who has read the Wheel of Time series will know that from the back of the book, where there is a glossary teaching you how to pronounce the words.