pronephric


pro·neph·ros

P0595200 (prō-nĕf′rəs, -rŏs′)n. pl. pro·neph·roi (-roi) or pro·neph·ra (-rə) A kidneylike organ, being either part of the most anterior pair of three pairs of organs in a vertebrate embryo, disappearing early in the embryonic development of most vertebrates.
[pro- + Greek nephros, kidney.]
pro·neph′ric (-rĭk) adj.