The shell membrane of an egg is a protective layer between the eggshell and the egg white. The membrane is made up of protein fibers and serves as a defense mechanism against bacteria and other harmful substances. Synonyms for the term "shell membrane" include "egg membrane," "eggshell membrane," "inner shell membrane," and "vitelline membrane." Each term accurately describes this thin layer, which acts as a barrier to protect the egg's contents. Whether you are discussing the properties of an egg or researching egg production, understanding the various synonyms for this important component can help you communicate more effectively about eggs and their inner structure.