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.

Restricted Eggs

Ungraded eggs, specifically checks, dirties, incubator rejects, inedibles, leakers and loss eggs. Checks have a broken shell or a crack in the shell, but the shell membranes are intact so that the egg contents don’t leak. Dirties may have adhering dirt, prominent or conspicuous stains, or moderate stains covering more than one-fourth of the shell surface. Incubator rejects have been subjected to the incubation process for a period of time. Inedibles are moldy, musty or sour or exhibit rot, blood rings, green whites, stuck yolks or embryo chicks. Leakers have a crack or break in both shell and shell membranes so that the contents are leaking. Loss eggs are leakers, inedibles and any eggs that have been cooked, frozen or contaminated. The Egg Products Inspection Act (EPIA) controls the disposition of restricted eggs to prevent them from getting into consumer channels. Checks and dirties may be sent to U.S. Department of Agriculture (USDA)-inspected egg-products plants where they can be handled and processed properly. They can’t be sold in the shell to restaurants, bakeries, food manufacturers or consumers unless such sales are specifically exempted by section 15 of the Act and not prohibited by state law. All other restricted eggs must be disposed of according to approved procedures.