also: ふっかぶつ
fluoride
Chemical term for a compound containing fluorine. Used in contexts such as dental health, water treatment, and industrial chemistry.
Toothpaste contains fluoride.
Some regions add fluoride to tap water.
Standard modern spelling using katakana for the element name.
Older kanji spelling using the now-obsolete character 弗 for fluorine. Rarely used today.
Compound of フッ (from 弗素, 'fluorine') + 化物 ('-ide'). The katakana spelling reflects the modern chemical naming convention.