|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a stew of meat, vegetables, potatoes, etc.|
|—n , pl -roi, -ra|
|mesonephros See also metanephros the first-formed anterior part of the embryonic kidney in vertebrates, which remains functional in the larvae of the lower vertebrates|
|[C19: New Latin, from |
pronephros pro·neph·ros (prō-něf'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, usually disappearing early in embryonic development.