A freshwater snail; (in later use) specifically one of the genus Viviparus (family Viviparidae).
Late Middle English; earliest use found in John Trevisa (c1342–?1402), translator.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。