1. Any of several similar fishes, such as the lamprey and electric eel. 
   任一种类似鱼类，如八目鳗和电鳗
2. large anadromous lamprey sometimes used as food; destructive of native fish fauna in the Great Lakes. 
   有时被食用的淡水产卵的大鳗鱼；北美五大湖本地鱼类区系的破坏者。
3. Any of various spiny-finned freshwater fishes of the genus Perca, especially either of two edible species, P. flavescens, of North America, and P. fluviatilis, of Europe. 
   河鲈任何一种有刺状鳍的鲈属淡水鱼，尤指两种可食用类，北美洲的金鲈和欧洲的河鲈
4. Any of various primitive eellike vertebrates of the class Agnatha, such as a lamprey, lacking jaws and true teeth and having a circular, sucking mouth. 
   圆口纲脊椎动物一种类似鳗鱼的无颚纲原始脊椎动物，如盲鳗，没有下颚和真正的牙齿，而长着圆形吮吸的嘴
5. A kidneylike organ, being either part of the most anterior pair of three pairs of organs in a vertebrate embryo, disappearing early in the embryonic development of higher vertebrates, but functioning as a kidney in some simple vertebrates, such as the lamprey. 
   前肾，原肾一肾状器官，是脊椎动物胚胎中三对器官最前面一对的一部分，在高级脊椎动物的早期发育时消失，但在一些初级脊椎动物中作为肾脏，如八目鳗

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