1. a cavity (in a tooth), a decayed tooth;〔医学用語で,虫歯の状態〕dental caries
    • 虫歯を処置する
    • treat a cavity [decayed tooth]
    • 虫歯を予防する
    • prevent 「tooth decay [cavities]
    • 虫歯が痛む
    • have a toothache