gel(redirected from brush-on, fluoride gel)
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[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
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A two-phase colloidal system consisting of a solid and a liquid in more solid form than a sol.
A semisolid material, somewhat elastic, composed of matter in a colloidal state that does not dissolve; remains suspended in a solvent. Also see cement gel.