亚原子 Traditional form: 亞原子 Pinyin (reading): yàyuánzǐ Definitions: subatomic Characters: 亚 - Asia; second 原 - source, origin, beginning 子 - son, child; seed, egg; fruit; small thing Traditional characters: 亞 - Asia; second 原 - source, origin, beginning 子 - son, child; seed, egg; fruit; small thing