/ Dictionary / Index A angiogenin: Meaning and Definition of Find definitions for: an•gi•o•gen•in Pronunciation: (an"jē-ō-jen'in, -oj'u-nin), [key] — n. a small, single-chain protein, resembling ribonuclease in structure, that stimulates the formation of new blood vessels. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. angiogenesis angiogram Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language