/ Dictionary / Index L lambdoidal suture: Meaning and Definition of Find definitions for: lambdoi'dal su'ture Pronunciation: [key] — Anat. Anat. the lambda-shaped seam or line of joining between the occipital and two parietal bones at the back part of the skull. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lambdoid lambency Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language