adj.单原子的
Helium is a monatomic chemically inert gas. 它是单原子惰性气体。
Thermal expansion of a monatomic nanochain[J]. 引用该论文 黄建平
Helium and argon are monatomic gases. 氦和氩都是单原子气体。
It is monatomic and extremely inert, forming no known chemical compounds. 它是单原子，极不活泼，没有已知的化合物。
The handwritten manuscript titled Quantum theory of the monatomic ideal gas was dated December 1924. 命名为单原子的理想气体量子说的手稿起始于1924年。
