Definition: 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. When most birds incubate eggs , the females often produce high levels of prolactin, a hormone involved in parental behavior. 2 a person possessing a specified quality. she was a good egg
More: هیلکەکان, هێلکە
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