/ Dictionary / Index A area vasculosa: Meaning and Definition of Find definitions for: ar'ea vas•cu•lo'sa Pronunciation: (vas"kyu-lō'su), [key] — Embryol. Embryol. that part of the area opaca in which the blood cells and vessels are formed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. area study area vitellina Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language