Compounds of 二次
- (n) secondary cooling water (esp. in a pressurized water reactor)
- (n) (comp) secondary storage
- (n) (comp) primary
secondary - (n) Battle of Shanghai (1937)
- (n) World War II
(P) - (n) (comp) secondary cache
- (n) secondary electron multiplier
- (n) (comp) two dimensional fast Fourier transform