Angiostasis is the strict regulation by the body over creation of new blood vessels, which is the normal state (homeostasis) for adult humans. The opposite state of angiostasis is angiogenesis, or the state of generating new blood vessels, as happens after injury, and during tumor growth. Interruption of angiostasis in adults is generally an indication of disease.
See angiogenesis for more information.
References
Angiostasis Wikipedia(Text) CC BY-SA