/ Dictionary / Index Y yolk stalk: Meaning and Definition of Find definitions for: yolk' stalk" Pronunciation: [key] a tubular connection between the yolk sac and the embryonic gut in the developing embryo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. yolk sac Yom Kippur 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