/ Dictionary / Index S scillism: Meaning and Definition of Find definitions for: scil•lism Pronunciation: (sil'iz-um), [key] — n. Pathol. poisoning by squill, characterized by vomiting, slow pulse, cardiac arrhythmia, and ventricular fibrillation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Scilla Scilly Isles Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language