stannous fluoride

noun

Medical Definition of stannous fluoride

: a white compound SnF2 of tin and fluorine used in toothpastes and oral rinses to prevent tooth decay

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“Stannous fluoride.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/stannous%20fluoride. Accessed 19 Apr. 2021.

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