三次元

three-dimensional / the real world (cf. 二次元[er4 ci4 yuan2])

three / 3

third / three times / (math.) degree three, cubic (equation)

next in sequence / second / the second (day, time etc) / secondary / vice- / sub- / infra- / inferior quality / substandard / order / sequence / hypo- (chemistry) / classifier for enumerated events: time

dimension (loanword, from Japanese)

surname Yuan / the Yuan or Mongol dynasty (1279-1368)

currency unit (esp. Chinese yuan) / first / original / primary / fundamental / constituent / part / era (of a reign) / meta- (prefix) / (math.) argument / variable / (Tw) (geology) eon