toothpaste; tooth powder
Refers to any dentifrice, including modern toothpaste and traditional tooth powder. In everyday use, it typically means toothpaste.
We're out of toothpaste, so I have to go buy some.
この歯磨き粉はミント味で、磨いた後がさっぱりする。
This toothpaste is mint-flavored and leaves a refreshing feeling after brushing.