1The bog bean, Menyanthes trifoliata.
2An aquatic fern of the genus Marsilea (family Marsileaceae), members of which have four clover-like leaflets; also called pepperwort.
Early 19th century. From water + clover.
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。