/ Dictionary / Index E egg tooth: Meaning and Definition of Find definitions for: egg' tooth" Pronunciation: [key] a calcareous prominence at the tip of the beak or upper jaw of an embryonic bird or reptile, used to break through the eggshell at hatching. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. egg timer egg white Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language