An oval or round object laid by a female bird, reptile, fish, or invertebrate, usually containing a developing embryo. The eggs of birds are enclosed in a chalky shell, while those of reptiles are in a leathery membrane.
Part of Speech
noun
Semantic Domain
Animals
Birds
Fish and marine creatures
Insects and small creatures
Reptiles and amphibians
Example Sentence
When most birds incubate eggs, the females often produce high levels of prolactin, a hormone involved in parental behavior.