Pectin
WordNet
noun
(1) Any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams
WiktionaryText
Noun
- A polysaccharide extracted from the cell walls of plants, especially of fruits; under acidic conditions it forms a gel. It is often used in processed foods, especially jellies and jams where it causes thickening (setting).
- Apple is rich in pectin and so is often added to other fruits when making jam so it will set.