Linked from
The 16 pages that link to Hydrogel, each with the reason it gives.
PolymerizationBroader topic: Polymerization can create networks that absorb large amounts of water.
HydrationBroader topic: Hydrogels are materials designed to absorb and hold large amounts of water.
Cross-linkBroader topic: Cross-links keep the water-rich polymer matrix from dissolving.
Gel (colloid)Broader topic: Hydrogels are gels whose continuous liquid phase is water.
HydrophileBroader topic: Hydrophilic polymer groups enable the network to absorb and retain water.