regeneration

noun

1.
(biology) growth anew of lost tissue or destroyed parts or organs
Derived from:
regenerate
2.
feedback in phase with (augmenting) the input
positive feedback
Derived from:
regenerate
3.
the activity of spiritual or physical renewal
Derived from:
regenerate
4.
forming again (especially with improvements or removal of defects); renewing and reconstituting
re-formation
Derived from:
regenerate