stannous
adjective
stan·nous ˈsta-nəs 
: of, relating to, or containing tin especially with a valence of two
Example Sentences
Recent Examples on the Web Not only will your teeth appear whiter within a week, but the powerful two-step system also improves your overall oral health thanks to the hydrogen peroxide and stannous fluoride included in the formula. 
Anthea Levi, Health.com, 16 Feb. 2022 Until now, researchers have been unable to stabilize stannous fluoride without making the product stain teeth yellow and dark brown. Popular Science, 3 Dec. 2019
Anthea Levi, Health.com, 16 Feb. 2022 Until now, researchers have been unable to stabilize stannous fluoride without making the product stain teeth yellow and dark brown. Popular Science, 3 Dec. 2019 Word History
Etymology
International Scientific Vocabulary, from Late Latin stannum
First Known Use
1849, in the meaning defined above
Medical Definition
stannous
adjective
stan·nous ˈstan-əs
: of, relating to, or containing tin especially with a valence of two