ナメクジウオなめくじうおMeanings1nounlancelet; amphioxususually written using kana aloneA small, fish-like marine invertebrate of the subphylum Cephalochordata. Used in biology contexts.ナメクジウオは脊せき索さく動どう物ぶつの研けん究きゅうでよく使つかわ