quadruped       
noun [ C ]  biology specialized uk/ˈkwɒd.rə.ped/ us/ˈkwɑː.drə.ped/
 四足动物
any animal that has four legs
  Horses, lions and dogs are quadrupeds, but humans are bipeds. 马、狮子和狗是四足动物,但人是两足动物。 
 Compare: biped 
 
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