"Yin-Yang" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
In Chinese philosophy and religion, two principles, one negative, dark, and feminine (yin) and one positive, bright, and masculine (yang), from whose interaction all things are produced and all things are dissolved. As a concept the two polar elements referred originally to the shady and sunny sides of a valley or a hill but it developed into the relationship of any contrasting pair: those specified above (female-male, etc.) as well as cold-hot, wet-dry, weak-strong, etc. It is not a distinct system of thought by itself but permeates Chinese life and thought. A balance of yin and yang is essential to health. A deficiency of either principle can manifest as disease. (Encyclopedia Americana)
Below are MeSH descriptors whose meaning is more general than "Yin-Yang".
Below are MeSH descriptors whose meaning is more specific than "Yin-Yang".
This graph shows the total number of publications written about "Yin-Yang" by people in this website by year, and whether "Yin-Yang" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.