| 单词 | 头索动物 |
| 释义 | 〔lancelet〕Any of various small, flattened marine organisms of the subphylum Cephalochordata, structurally similar to the vertebrates but having a notochord rather than a true vertebral column. Also called amphioxus 蛞蝓鱼类：任一种体形较小的头索动物纲的扁平海洋动物，它们在结构上与脊椎动物类似，但只有一个脊索而没有真正的脊椎 也作 amphioxus〔cephalochordate〕Of, relating to, or belonging to the subphylum Cephalochordata.头索动物亚门的：属于、关于或隶属头索动物亚门的〔cephalochordate〕Any of various primitive chordate animals of the subphylum Cephalochordata, such as the lancet, that lack a true vertebral column.头索动物：头索动物亚门的一种原始脊索动物，如帆蜥鱼，无真正的脊柱 |
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