单词：fundamental_quantity 

名词

• 
  [1.n.fundamental_quantity] (同义词:[fundamental_quantity]  [fundamental_measure]  )
• 
  注释列句：one of the four quantities that are the basis of systems of measurement
• 上位词 -> [measure]  [abstraction]  [entity] 
• 下位词 -> [temperature]  [mass]  [length]  [time_period]