Related Clues:

• Culture content
• Soup thickener
• Gel in biology class, perhaps
• Cultural milieu
• Lab medium
• Jiggly dessert
• It helps a culture develop
• Lab gelatin
• Microbiologist's medium
• Cultural medium?
• Petri-dish gel, perhaps
• Petri dish layer
• Petri dish gelatin
• Nail strengthener
• When repeated, it's Malay for "jelly"