alunogen / əˈlu nə dʒən /

📖毕业后词汇阿尔诺根阿伦原阿伦根阿鲁诺根

alunogen 的定义

n. 名词 noun
  1. a mineral, hydrous sulfate of aluminum, Al23⋅18H2O, occurring as a white, fibrous crust on quarry or mine walls.