1. of or relating to or characteristic of the Chordata. 
   属于、关于或具有脊索类动物特征。
2. fishlike animals having a notochord rather than a true spinal column. 
   有脊索但无真正的脊柱鱼类动物。
3. any animal lacking a backbone or notochord; the term is not used as a scientific classification. 
   缺少脊椎或脊索的动物；该术语不用于科学分类。
4. A notochord limited to the caudal region, characteristic of the urochordates. 
   尾索限于尾部的脊索，有尾索动物的特征
5. free-swimming larva of ascidians; they have a tail like a tadpole that contains the notochord. 
   自由游动的海鞘类幼体；它们有含有脊索的蝌蚪形尾巴。

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• 1. chordate
  具有havepossess...具有脊索的chordate...具有进入的资格的admittable
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