Tapetum

Definition

A reflective layer of cells in the eyes of certain arthropods, such as spiders, which enhances their night vision by reflecting light back through the retina.

Etymology

From Latin 'tapetum', meaning 'carpet' or 'covering'.

Example

The tapetum in a wolf spider's eyes helps it to see better in low light conditions.

Synonyms

• Tapetum lucidum

Related Terms

• Night vision
• Retina
• Arthropod eyes

Usage Notes

The tapetum can vary in color and structure among different species, often giving an eyeshine effect when light is shone into the eyes.