atom/'ætəm/

n. the smallest unit of a chemical element

n. [C] 原子，微粒：one carbon atom and two oxygen atoms 1个碳原子和2个氧原子

◇〈喻〉 [an atom of sth] There isn't an atom of truth in it.一点真实性都没有。

音组-tom/-təm/

atom; bottom; custom; symptom