Eggshells are the outermost layer of an egg which are usually white or brown in color. Synonyms for eggshells include eggshard, eggshell fragment, and eggshell piece. Other synonyms for eggshells include eggshell powder, eggshell membrane, and calcified eggshell. In addition, there are various slang terms used to refer to eggshells, such as "cluckers", "shells", and "chicken skin". These synonyms of eggshells are commonly used in various contexts, such as in culinary arts, biology, and agriculture. Regardless of the context, eggshells are a fundamental part of an egg and provide a range of benefits, including nutrition and protection for the developing embryo.