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A gel is a semi-solid system in which a liquid is dispersed within a solid network, forming a three-dimensional structure. Gels exhibit properties of both solids and liquids.
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Colloid: A mixture where one substance is dispersed evenly throughout another at microscopic or nanoscopic scales without settling out.
Gelation: The process by which molecules in a liquid form a network structure to create a gel.
Thixotropy: A property of certain gels or fluids that become less viscous when subjected to shear stress, such as shaking or stirring.