noun
tooth powder made from roasted chickweed and salt
A traditional oral care preparation: chickweed (stitchwort) is roasted with salt and ground into a fine powder used as toothpaste. Rare term, mainly of historical or folk-medicine interest.
江戸時代には、ハコベ塩を歯磨き粉として使っていた。
In the Edo period, people used hakobe-jio as tooth powder.
Modern toothpaste or tooth powder; ハコベ塩 is a specific traditional preparation.
Compound of ハコベ (chickweed) and 塩 (salt), describing the ingredients and preparation method.