| corresponding in function, but not evolved from corresponding organs, as the wings of a bee and those of a hummingbird |
| the cell produced by the union of two gametes before it undergoes cleavage or cell division |
angiogenesis an·gi·o·gen·e·sis (ān'jē-ō-jěn'ĭ-sĭs)
n.
The development of the blood vessels.
| angiogenesis (ān'jē-ō-jěn'ĭ-sĭs) Pronunciation Key
The formation of new blood vessels, especially blood vessels that supply oxygen and nutrients to cancerous tissues. |