| a white, crystalline powder, SnF2, slightly soluble in water: used as a source of fluorine in the prevention of dental caries, esp. as a toothpaste additive. |
| stannous fluoride n. A white powder, SnF2, used to fluoridate toothpaste. |
stannous fluoride n.
A preparation of stannous tin and fluoride used to fluoridate toothpaste and other dental preparations.