- 二次元 èrcìyuán two-dimensionalTwo-dimensional; having the dimensions of height and width
- 三次元 sāncìyuán three-dimensional; the real worldThree-dimensional; often used in ACG (anime, comic, games) contexts to refer to the real world in contrast to the fictional two-dimensional world ([[二次元|二次元|er4 ci4 yuan2]])