/ Dictionary / Index S sieve cell: Meaning and Definition of Find definitions for: sieve' cell" Pronunciation: [key] — Bot. Bot. an elongated cell whose walls contain perforations that are arranged in circumscribed areas and that afford communication with similar adjacent cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sieve sieve of Eratosthenes Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language