Noun
English Wikipedia has an article on:nephridioporeWikipedia
nephridiopore (plural nephridiopores)
The external opening of a nephridium.
Each consists of a small pouch that is connected, via a flagellated conductor called a nephridioduct, to an opening at the base of the nearest leg known as a nephridiopore. Source: Internet
The composition of the urinary solution is modified in the nephridioduct by selective recovery of nutrients and water and by isolation of poison and waste materials, before it is excreted to the outside world via the nephridiopore. Source: Internet