Welcome to the The Incredible Edible Egg™ Eggcyclopedia, where you can access the latest egg information from A-Z. The Eggcyclopedia was developed by the American Egg Board (AEB) on behalf of America's egg farmers who are committed to caring for their hens and producing high-quality eggs for you and your families.

Just click on any letter below to bring up a list of egg terms and their related definitions.


In the U.S., by federal law, passed into law more than 50 years ago, neither laying hens nor any other type of poultry can be fed hormones. However, eggs contain natural hormones. Therefore, the statement "no hormones" is considered misleading to the consumer. The egg industry does not use hormones in the production of shell eggs. The FDA requires a qualifying statement on the label for shell eggs, which is "Hormones are not used in the production of shell eggs".