/ Dictionary / Index C chambered nautilus: Meaning and Definition of Find definitions for: cham'bered nau'tilus Pronunciation: [key] nautilus (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chambered chamberer Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language