| zǐ | purple/violet/amethyst/Lithospermum erythrorhizon (flowering plant whose root provides red purple dye)/Japanese: murasaki |
| 紫 | purple violet amethyst |
| 紫丁香 | lilac |
| 紫云 | Ziyun Hmong and Buyei autonomous county in Anshun 安順|安顺 |
| 紫云苗族布依族自治县 | Ziyun Hmong and Buyei autonomous county in Anshun 安順|安顺 |
| 紫云英 | Chinese milk vetch; Chinese clover; milk vetch |
| 紫坪铺 | Zipingpu reservoir, Sichuan |
| 紫坪铺大坝 | Zipingpu reservoir, Sichuan |
| 紫坪铺水库 | Zipingpu reservoir, Sichuan |
| 紫堇 | turkey corn; fumaria; violet |
| 紫外 | ultraviolet (ray) |
| 紫外光 | ultraviolet light |
| 紫外射线 | ultraviolet ray |
| 紫外线 | ultraviolet ray |
| 紫外线光 | ultraviolet light |
| 紫外线光谱 | [Physics] Ultra Violet spectroscopy |
| 紫外线滤光镜 | an ultraviolet filter |
| 紫外线灯 | an ultraviolet lamp |
| 紫外线疗法 | an ultraviolet ray treatment |
| 紫式部 | Murasaki Shikibu (born c. 973), Japanese writer, author of "The Tale of Genji" |
| 紫微宫 | palace of Jade emperor (in Taoism) |