/ Dictionary / Index S spirulina: Meaning and Definition of Find definitions for: spi•ru•li•na Pronunciation: (spī"ru-lī'nu), [key] — n. any of the blue-green algae of the genus Spirulina, sometimes added to food for its nutrient value. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spirula spiry 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