noun🔗ShareNeunaugeAny long slender primitive eel-like freshwater and saltwater fish of the order Petromyzontiformes, having a sucking mouth with rasping teeth but no jaw."The fisherman was surprised to find a lamprey attached to the side of the large trout he had caught, its toothy, sucking mouth firmly latched on. "Der Fischer war überrascht, ein Neunauge an der Seite der großen Forelle zu finden, die er gefangen hatte, mit seinem zahnigen, saugenden Maul fest daran befestigt.fishanimalbiologyChat with AIVocabulary GamePractice Reading