gelling agent; gellant
Technical term used in food science, chemistry, and pharmaceuticals for substances that cause a liquid to gel.
このゼリーにはゲル化剤として寒天が使われている。
Agar is used as a gelling agent in this jelly.
Compound of ゲル (gel, from German 'Gel') + 化 (change, -ize) + 剤 (agent, preparation).