/ Dictionary / Index C cylinder seal: Meaning and Definition of Find definitions for: cyl'inder seal" Pronunciation: [key] a small carved cylinder used esp. by the ancient Mesopotamians to impress a design in wet clay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cylinder saw cylindraceous Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language