IPA: /ˌmɛtəˈnɛfɹəs/
KK: /mɛtəˈnɛfros/
The last stage of kidney development in vertebrate embryos, which becomes the main kidney in adult reptiles, birds, and mammals.
In mammals, the metanephros is the organ that ultimately forms the adult kidney.
Metanephros is formed from "meta-" (meaning beyond or after) and "nephros" (meaning kidney in Greek). The term refers to the final stage of kidney development in vertebrates, indicating a kidney that develops after the earlier stages.
Think of 'meta-' meaning beyond or after, and 'nephros' meaning kidney. This helps you remember that 'metanephros' refers to the kidney that develops after earlier forms.