Autotomy
Autotomy, the ability of certain animals to release part of the body that has been grasped by an external agent. A notable example is found among lizards that break off the tail when it is seized by a predator. The phenomenon is found also among certain worms, salamanders, and spiders. The cast-off part is sometimes regenerated.
This article was most recently revised and updated by Amy Tikkanen.
Citation Information
Article Title:
Autotomy
Website Name:
Encyclopaedia Britannica
Publisher:
Encyclopaedia Britannica, Inc.
Date Published:
06 November 2026
Access Date:
November 14, 2026