Animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds WordNet 3.0 & Open English WordNet

An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the animal hatches. Wikipedia

Organic vessel in which an embryo begins to develop. Wikipedia Disambiguation

Organic vessel in which an embryo first begins to develop Wikidata

An approximately spherical or ellipsoidal body produced by birds, snakes, insects and other animals housing the embryo during its development. OmegaWiki