1. Any of several small North American freshwater game and food fishes of the genus Esox, especially E. reticulatus, of the eastern and southern United States. 
   狗鱼一种狗鱼属北美淡水小猎物和食用鱼，尤指美国东部和南部的网狗鱼
2. A freshwater game and food fish(Esox lucius) of the Northern Hemisphere that has a long snout and attains a length of over1.2 meters(4 feet). 
   狗鱼，北美狗鱼北半球的一种淡水猎物和食用鱼（白斑狗鱼狗鱼科），有长长的鼻子，可达1。2米多（4英尺）
3. A large food and game fish(Esox masquinongy), the largest member of the pike family, found in lakes and rivers of the northern United States and southern Canada. 
   北美狗鱼一种大型食用和猎用鱼（北美狗鱼），狗鱼科中最大的一种，发现于美国北部和加拿大南部的湖、河中
4. an arthropod genus formerly called genus Ctenocephalus. 
   蚤的一个属，包括狗蚤和猫蚤。
5. extinct horse genus; formerly called genus Eohippus. 
   已灭绝的马的一个属；以前被称为始祖马属。

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