2513950 jmdict A [id=2223729]
作用因
さよういん
[1][n][fld=phil]
  efficient cause (one of Aristotle's four fundamental types of answer to the question "why?")
  [see=2513930・質料因[1]]
  [see=2513920・形相因[1]]
  [see=2513910・目的因[1]]