/ Dictionary / Index N notochord: Meaning and Definition of Find definitions for: no•to•chord Pronunciation: (nō'tu-kôrd"), [key] — n. Embryol. a rodlike cord of cells that forms the chief axial supporting structure of the body of the lower chordates, as amphioxus and the cyclostomes, and of the embryos of the vertebrates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: notochord (Thesaurus) noto- Notogaea Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language