/ Dictionary / Index S spectrin: Meaning and Definition of Find definitions for: spec•trin Pronunciation: (spek'trin), [key] — n. Biochem. a rodlike structural protein of the red blood cell membrane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spectre spectro- Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language