—n. 1. Physical Chem.a semirigid colloidal dispersion of a solid with a liquid or gas, as jelly, glue, etc.
2. Theat.gelatin (def. 5).
3. Biochem.a semirigid polymer, as agarose, starch, cellulose acetate, or polyacrylamide, cast into slabs or cylinders for the electrophoretic separation of proteins and nucleic acids.
—v.i. 1. to form or become a gel.
2. jell (def. 2).