mesonephros(redirected from middle kidney)
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mes·o·neph·ros(mĕz′ə-nĕf′rəs, -rŏs′, mĕs′-)
The second of the three excretory organs that develop in a vertebrate embryo, becoming the functioning kidney in fish and amphibians but replaced by the metanephros in birds, reptiles, and mammals. Also called Wolffian body.
[meso- + Greek nephros, kidney.]
[C19: New Latin, from meso- + Greek nephros kidney]
mes•o•neph•ros(ˌmɛz əˈnɛf rɒs, ˌmɛs-, ˌmi zə-, -sə-)
n., pl. -roi (-roi).
an excretory organ of vertebrate embryos, developing into the functional kidney in fishes and amphibians and into part of the ducts and tubules of the reproductive system in reptiles, birds, and mammals.
[1875–80; meso- + Greek nephrós kidney]