noun
fluoride
FLOOR-ryd
noun
1
A chemical compound containing fluorine, commonly added to water or toothpaste to help prevent tooth decay.
"Most toothpaste contains fluoride to strengthen tooth enamel."
How to Use Fluoride
Learner’s notesIn plain EnglishA chemical, usually found in toothpaste or drinking water, that helps protect teeth from decay.
Common pairings
fluoride toothpaste
fluoride treatment
add fluoride to water
Word Forms
fluorides plural
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Most toothpaste contains _____ to strengthen tooth enamel.
Etymology
From "fluorine" plus the chemical suffix "-ide," used for compounds formed with another element.