- 双子座 shuāngzǐzuò GeminiGemini (zodiac sign and constellation); traditionally considered to rule the period from May 23rd to June 21st
- 双子叶植物 shuāngzǐyèzhíwù dicotyledona plant with an embryo that has two seed leaves (cotyledons)
- 双子叶 shuāngzǐyè dicotyledonA plant characterized by having two embryonic leaves; includes most flowering trees, daisies, and broadleaved plants
- 双子星 shuāngzǐxīng Gemini(astronomy) the zodiac constellation Gemini; also refers to the third sign of the zodiac in Western astrology; same as [[双子座|雙子座|shuang1 zi3 zuo4]]
- 双子星大楼 shuāngzǐxīngdàlóu Twin Towersthe Twin Towers, specifically referring to landmark twin skyscraper complexes such as the former World Trade Center in New York City