单词 | dimetrodon |
释义 | dimetrodonnoun di·met·ro·don dī-ˈme-trə-ˌdän plural dimetrodons : an extinct, North American, primitive synapsid (genus Dimetrodon) of the early Permian comprising terrestrial carnivores of moderate size having both canine and shearing teeth and distinguished by a large dorsal crest resembling a sail supported by greatly elongated bony processes of the spinal column Note: Dimetrodons are often mistaken for dinosaurs but were extinct more than 35 million years before dinosaurs appeared on earth. |
随便看 |
英语词典包含469781条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。