/ Dictionary / Index S spirogyra: Meaning and Definition of Find definitions for: spi•ro•gy•ra Pronunciation: (spī"ru-jī'ru), [key] — n. Bot. a widely distributed filamentous freshwater green alga of the genus Spirogyra. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: spirogyra (Thesaurus) spirograph spiroid Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language