What does dextrin mean?
Dextrin is a soluble, gummy carbohydrate produced when starch is broken down by heat, enzymes, or acids — a process called partial hydrolysis. Because it consists of a blend of polysaccharide fragments rather than a single defined molecule, chemists speak of dextrins collectively or specify varieties such as white, yellow, or wheat dextrin. Its practical virtues are stickiness, water solubility, and mildness: qualities that make it valuable as an adhesive on postage stamps and envelopes, a binder in pills and confectionery, a crispness enhancer in baked goods, and even a source of soluble dietary fibre in supplements. The name reflects a chemical property — dextrins rotate polarized light to the right, from Latin dexter, meaning 'right'. Though rarely heard outside technical settings, dextrin is a quietly ubiquitous material, present in everything from the glue under a lickable stamp to the coating on many processed foods.
nounA soluble gummy carbohydrate obtained by the partial hydrolysis of starch, consisting of a mixture of polysaccharides of varying chain length. Dextrins are widely used as adhesives, in food processing, and as binders and coatings in industry.
- A soluble gummy substance obtained by partial hydrolysis of starch, used especially as an adhesive, binder, and food additive.
"The stamp's gum was made from a thin layer of dextrin that softened when licked."
"Manufacturers coat the envelopes with a strip of dextrin that becomes sticky when moistened."
"Wheat dextrin is often added to soft drinks as a source of dietary fibre."
The plural is used when referring to distinct types or preparations of dextrin; in most contexts the word is uncountable.
"Different roasting temperatures yield different dextrins, each with its own colour and binding strength."
Dextrins are named for their ability to rotate polarized light to the right — the same 'right hand' root that gives us 'ambidextrous', literally 'having two right hands'.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does dextrin come from?
Dextrin derives from French dextrine, coined in the early nineteenth century from Latin dexter, meaning 'on the right' or 'right-hand'. The name refers to the compound's optical activity: solutions of dextrin rotate plane-polarized light clockwise, that is, to the right (dextrorotatory). The same Latin root gives English words such as dexterity, dexterous, dextral, and ambidextrous, all built on the ancient association of the right hand with skill.
How dextrin is actually used
Dextrin is chiefly a technical term encountered in chemistry, food science, and manufacturing contexts rather than everyday conversation. It is an uncountable mass noun referring to a mixture of substances rather than one single compound.
Easily confused with dextrin
Dextrose is the simple sugar glucose, whereas dextrin is a mixture of larger starch-derived polysaccharides formed by partially breaking down starch.