Chitin

Definition

A long-chain polymer of N-acetylglucosamine, a derivative of glucose, which is a primary component in the exoskeletons of arthropods and the cell walls of fungi.

Etymology

From French 'chitine', derived from the Greek 'chiton', meaning 'tunic' or 'covering'.

Example

The hard exoskeleton of beetles is made primarily of chitin, providing both protection and structure.

Related Terms

• Exoskeleton
• N-acetylglucosamine
• Polysaccharide
• Cuticle

Usage Notes

Chitin is similar to cellulose in its structure but has a greater strength due to the N-acetylglucosamine content. It is often combined with other substances to enhance its properties.