Nephrostome n. : The funnelshaped opening of a nephridium into the body cavity.

Example:
What is the function of coleom in Earthworms?

Taxonomy
Nephrostome, free encyclopedia, search, metanephridium, funnel, component, substances, Personal tools, Interaction, Toolbox, Languages, non-profit organization, coelom, cilia, metabolic wastes, hormones, en.wikipedia, wiki.

Defination from the web:
Nephrostome. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Nephrostome is the funnel-like component of a metanephridium. ... The nephrostome is covered from the inside with cilia, which push the water, metabolic wastes, unnecessary hormones and other substances into the ...