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An egg is an ovum produced by a female animal for reproduction, often prepared as food. Eggs are a source of protein.

Most edible eggs, including bird eggs and turtle eggs, consist of a hard, oval outer eggshell, the "egg white," or albumen, the egg yolk, and various thin membranes. Every part of these eggs is edible, although the eggshell is generally discarded.

Roe and caviar are edible eggs produced by fish.