1Any of various carnivorous South American mammals associated with water; especially the giant otter, Pteronura brasiliensis.
2Any of various large predatory water beetles of the genus Dytiscus or family Dytiscidae; a larva of such a beetle.
Late 18th century.
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。