: a naturally-occurring protein that is derived from the cleavage of plasminogen and that inhibits the formation and growth of blood vessels
… angiostatin shrinks blood vessel growth by binding to and shutting down ATP synthase, an enzyme on an endothelial cell's surface. It thereby cuts off the energy required for blood vessel growth.—Gary Stix, Scientific American
Love words? Need even more definitions?Merriam-Webster unabridged
See Definitions and Examples »
Get Word of the Day daily email!
Words at Play
Palter, Dissemble, and Other Words for Lying
Skunk, Bayou, and Other Words with Native American Origins
You've used more than you might think
Words For Things You Didn't Know Have Names, Vol. 2
When 'thingamajig' and 'thingamabob' just won't do
When Were Words First Used?
Look up any year to find out
Ask the Editors