理學 [ㄌㄧˇ ㄒㄩㄝˊ; li3 xue2]
  School of Principle
  Neo-Confucian Rationalistic School (from Song to mid-Qing times, c. 1000-1750, typified by the teachings of Cheng Hao 程顥[ㄔㄥˊ ㄏㄠˋ; cheng2 hao4], Cheng Yi 程頤[ㄔㄥˊ ㄧˊ; cheng2 yi2] and Zhu Xi 朱熹[ㄓㄨ ㄒㄧ; zhu1 xi1])
  理學 [ㄌㄧˇ ㄒㄩㄝˊ; li3 xue2]
  science
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  理学
  りがく
  noun (common) (futsuumeishi)
  physical science (e.g. chemistry, biology, etc.)
  physics
  lixue (Song-era Chinese philosophy)
  see: 哲学
  archaism
  philosophy
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