/ Dictionary / Index U uncinate process: Meaning and Definition of Find definitions for: un'cinate proc"ess Pronunciation: [key] — Ornith. Ornith. a curved, bony process on certain ribs of birds that projects backward and overlaps the succeeding rib, serving to strengthen the thorax. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. uncinate UNCIO Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language