pronephron (English, noun)
expansion: pronephron (plural pronephrons)
Senses:
topics: biology
natural-sciences
glosses: The first part of the urogenital system to be differentiated in a vertebrate embryo, which functions as a simple excretory organ in simpler forms, serves as a provisional kidney in some fish and amphibians, and only appears as a temporary embryonic structure in reptiles, birds, and mammals.
Forms:
form: pronephrons
tags: plural