- 阿尔法射线 ā'ěrfǎshèxiàn alpha rayA stream of alpha particles emitted during radioactive decay. In Taiwan, also known as [[阿伐射线|阿伐射線|a1 fa2 she4 xian4]]; in Mainland China, also known as [[甲种射线|甲種射線|jia3 zhong3 she4 xian4]].
- 阿尔法男 ā'ěrfǎnán alpha malea dominant, influential, or powerful man in a social group
- 阿尔法粒子 ā'ěrfǎlìzǐ alpha particlea helium nucleus emitted during radioactive decay; carries a positive charge and has relatively low penetrating power