原子科学家 yuánzǐkēxuéjiā atomic scientist Origin Definitions Defs Strokes Stroke Words Sentences Sents 原子 yuánzǐ noun atom atom; atomic; the smallest unit of a chemical element, consisting of a nucleus surrounded by electrons科学家 科學家 kēxuéjiā noun scientist expert in scientific research, usually referring to someone who has achieved significant results in their field