Related Clues:

• Petri dish contents, perhaps
• Gelling agent from seaweed
• Edible seaweed
• Seaweed
• Food-thickening agent
• Seaweed gel
• Petri dish stuff
• Cultural aid?
• Petri dish medium
• Bacteriologist's medium
• Ice cream additive
• Petri-dish stuff
• Staph dining area?
• Petri dish mixture
• Thickening agent in food