[-roi] . Embryology. Based on the Random House Dictionary, © Random House, Inc. 2012.
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| a scrap or morsel of food left at a meal. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| metanephros (ˌmɛtəˈnɛfrɒs) | |
| —n , pl -roi | |
| pronephros See also mesonephros the last-formed posterior part of the embryonic kidney in reptiles, birds, and mammals, which remains functional in the adult | |
| [C19: New Latin, from | |
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metanephros met·a·neph·ros (mět'ə-něf'rəs, -rŏs')
n. pl. met·a·neph·roi (-roi')
The third and final excretory organ that develops in a vertebrate embryo. In birds, reptiles, and mammals it replaces the mesonephros as the functional excretory organ and develops into the adult kidney.
met'a·neph'ric (-rĭk) adj.
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metanephros
permanent kidney in reptiles, birds, and mammals, developing by the 10th week in human embryos from the lower part of the Wolffian duct, and replacing the embryonic structure called the mesonephros. It consists of a compact, paired organ containing many nephrons; a ureter separate from the Wolffian duct leads from the metanephros to the bladder.
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