Y

Yarrow
A healing herb with over 120 different compounds, with each acting like taking 120 different medicines since they work in the body in a particular balance with each other.

Yin and Yang
Opposites in Chinese medicine.

Yin is seen as the female energy, dark and cold. Yang is seen as the male energy, light and hot. Both are believed to be necessary to maintain health; and many ills are attributed to a deficiency or excess of either factor. Different parts of the body are described as predominantly yin or yang. For example, body fluids and blood are mainly yin, while qi, the vital energy, tends to be yang. Qi is regarded as flowing in a network of channels, or meridians, through the body and can be stimulated by acupuncture.