| 单词 | mesogastropod | 
| 释义 | mesogastropodn. Zoology.   A prosobranch gastropod of the order  Mesogastropoda, comprising chiefly marine molluscs which possess only one monopectinate gill, auricle, and nephridium, and a radula with seven teeth in a transverse row. ΚΠ 1955    Philos. Trans. 		(Royal Soc.)	 B. 239 150  				In very few mesogastropods do these pouches appear in their primitive form. 1958    J. E. Morton Molluscs ii. 32  				The highest and largest mesogastropods belong to the superfamily Doliacea. 1975    Nature 15 May 233/1  				Calcified eggs have also been reported from land archaeogastropods and from some of those mesogastropods which deposit their eggs on land. 1990    Jrnl. Molluscan Stud. 56 147/2  				In freshwater mesogastropods..the production of copious hyposmotic urine necessitates rapid resorption, not only of organic solutes, but also of ions. This is a new entry (OED Third Edition, September 2001; most recently modified version published online March 2022). < | 
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