noun

1. a colloidal form of matter having a jellylike texture, usually formed by cooling a colloidal solution into a solid or semisolid phase
2. any of various jellylike preparations used to style hair, clean teeth, etc.
3. gelatin ()

Etymology: < gelatin

intransitive verb gelled, gelling gel′·ling

1. to form a gel
2. Brit. jell (vi.)