Each entry gives the term in traditional and simplified form, its pinyin, the senses it carries in the classical corpus, the passages where it does real work, and how published translations have rendered it.
qián yīn
The front yin: the genital region and its openings. The chapter gives it a double description — the gathering place of the ancestral sinews, and the meeting place of greater yin and yang brightness — and then uses it to account for what excess costs the lower body. The same 前 recurs below in 前閉 and 不得前後 for the front passage.