- 正负电子对撞机 zhèngfùdiànzǐduìzhuàngjī electron-positron collidera particle accelerator designed to cause collisions between electrons and positrons
- 正负电子 zhèngfùdiànzǐ electrons and positronselectrons and their antiparticles, positrons
- 正负号 zhèngfùhào plus-minus signthe mathematical symbol ± representing both positive and negative values
