Chitin (noun)

A tough, semitransparent substance that forms the exoskeletons of arthropods and the cell walls of fungi, and is also present in the shells of some other invertebrates.

Origin:

From french chitine, from greek khitōn (tunic).

Examples:

1. The exoskeleton of the insect is made of chitin.
2. Chitin is a tough, semitransparent substance that forms the exoskeletons of arthropods.
3. Chitin is a complex polysaccharide and is the most abundant polysaccharide on earth.
4. Chitin is also used in the food industry as a thickener and a stabilizer.
5. Chitin is found in the shells of crustaceans, the exoskeletons of insects, and in some fungi.