- 三次方程 sāncìfāngchéng cubic equationan equation where the highest power of the unknown variable is three; cubic equation
- 三次方程式 sāncìfāngchéngshì cubic equationan algebraic equation in which the highest power of the unknown variable is to the third degree
- 开三次方 kāisāncìfāng to extract a cube rootto calculate the cube root of a number in mathematics