dental dam
noun [ C ] uk/ˈden.təl ˌdæm/ us/ˈden.t̬əl ˌdæm/
牙科用橡皮布（牙科治疗中使用的胶皮防水布或口交中防止染上艾滋病所使用的阻隔膜）
a piece of rubber that is used to keep the teeth dry during dental treatment, or that is used to protect the mouth during sexual activity
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。