colloids
type: Concept
narrower: gels

gels
type: Concept
narrower: silica gel
narrower: hydrogels
narrower: drug gels
broader: semi solids
broader: colloids

silica gel
type: Concept
broader: gels

hydrogels
type: Concept
broader: gels

drug gels
type: Concept
broader: gels

semi solids
type: Concept
narrower: gels

concepts
type: Collection
type: ConceptGroup
member: gels