Self-regenerating

Modeled on the blood vessels that make up the human circulatory system, scientists have created a plastic material that repairs itself. Researchers believe self-regenerating plastic could be used in many ways.

Source: tatoeba (11172607)

In that country as in France there are a few illustrious exceptions, and symbols of a self-regenerating age; symptoms of a gradual return from error, and the invincible power and majesty of truth.

Source: wiktionary

When it is remembered that knowledge exerts a self-expanding and self-regenerating power, and that the relations not only among the several American communities, but between all regions of the earth, are becoming more and more intimate, it is perhaps not presumptuous to suppose that the ripened fruits of the plan are to be developed in the intellectual, moral and social improvement of the whole human family.

Source: wiktionary

But even granting that this self-regenerating energy were as vigorous as formerly, and that it has not more to do battle with now than heretofore, there is another and more serious question behind.

Source: wiktionary