a substance released by solid tumors that induces formation of new blood vessels to supply the tumor.
tu·mor an·gi·o·gen·ic fac·tor
(TAF) (tū'mŏr an'jē-ō-jen'ik fak'tŏr) A substance released by a solid tumor that induces formation of new blood vessels to supply the tumor. Synonym(s): tumour angiogenic factor.