- 阴阳怪气 yīnyángguàiqì eccentricmysterious and eccentric in manner or speech; to be cryptic, cynical, or passive-aggressive in a way that is hard to pin down
- 阴阳人 yīnyángrén intersex person; hermaphroditeA person born with both male and female sex organs; an intersex person or hermaphrodite.
- 阴阳家 yīnyángjiā School of Yin-YangA philosophical school during the Warring States period focused on the principles of yin-yang and the five elements; its main representative was [[邹衍|鄒衍|zou1 yan3]]
- 阴阳脸 yīnyángliǎn two-faced personA person who acts one way in public or to someone's face but another way in private; someone whose attitude changes completely changes depending on who is watching
- 阴阳历 yīnyánglì lunisolar calendarA calendar system that combines the cycles of both the moon and the sun, such as the Chinese traditional [[农历|農曆|nong2 li4]].
- 阴阳生 yīnyángshēng astrologerProfessional practitioners of divination, astrology, and geomancy; specifically refers to those hired to choose auspicious dates or handle feng shui for funerals.
- 阴阳合同 yīnyánghétóng dual contractA fraudulent deal where parties sign two versions of an agreement: an unofficial "yin contract" with the real terms and an official "yang contract" with fake terms to deceive authorities, often for tax evasion.
- 阴阳五行 yīnyángwǔxíng yin-yang and the five elementsThe core concepts of ancient Chinese cosmology and philosophy, combining the dual forces of [[阴阳|陰陽|yin1 yang2]] with the five elementary forces or phases of [[五行|五行|wu3 xing2]] (wood, fire, earth, metal, and water). This school of thought influenced all aspects of Chinese culture, including statecraft, medicine, and divination.
- 阴阳先生 yīnyángxiānsheng geomancerA professional who practices fortune-telling, choosing auspicious dates for events, or feng shui, particularly for burial sites and funeral rites.
- 半阴阳 bànyīnyáng hermaphroditismthe condition of having both male and female biological characteristics; ambisexuality
- 阴阳对转 yīnyángduìzhuǎn yin-yang vowel alternationA term in Chinese phonology describing the historical alternation or exchange between syllables ending in a vowel (yin) and those ending in a nasal consonant (yang); often used to explain relationships between phonetic components in characters or dialect variations. Shortened to [[对转|對轉|dui4 zhuan3]]
- 阴阳水 yīnyángshuǐ yinyang watera mixture of unboiled water and boiled water, or well water and river water; often used in traditional Chinese medicine as a base for preparing or taking medicine