/ Dictionary / Index P plexal: Meaning and Definition of Find definitions for: plex•al Pronunciation: (plek'sul), [key] — adj. of or pertaining to a plexus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -plex plexiform Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language