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Medical Definition of Nephrostoma
1. One of the ciliated funnel-shaped openings by which pronephric and some primitive mesonephric tubules communicate with the celom. Origin: nephro-+ G. Stoma, mouth (05 Mar 2000)
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1. One of the ciliated funnel-shaped openings by which pronephric and some primitive mesonephric tubules communicate with the celom. Origin: nephro-+ G. Stoma, mouth (05 Mar 2000)