詞語：agnatha
agnatha的同義詞
n. superclass agnatha
agnatha的解釋
agnathan. 無顎類脊椎動物
agnatha的意思
agnatha 無頜類;無頷總綱;動物;無頜魚類;
agnatha的參考例句
1.The Galeaspid is one major group of Agnatha in the Middle Paleozoic, and is mainly distributed in China and North Vietnam. 盔甲魚類是古生代中期化石無頜類的主要類群，其分佈主要限於我國境內以及越南北部。
2.Any of various primitive eel like vertebrates of the class Agnatha, such as a lamprey, lacking jaws and true teeth and having a circular, sucking mouth. 圓口綱脊椎動物一種類似''。'鰻魚'。''的無顎綱原始脊椎動物，如盲鰻，沒有下顎和真正的牙齒，而長著圓形吮吸的嘴。
3.pineal foramen A small opening in the skull roof in the pineal plate of Placoderms and Agnatha and between the frontals in Osteichthyes - the "third eye". 松果孔盔甲魚和無頜魚頭蓋骨頂部松果板內的小開口；硬骨魚額骨間的小開口-「第三個眼」。