spinal column

名词 spinal column:

1. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
   同义词：vertebral column, spine, backbone, back, rachis

1. An animal, such as an insect or a mollusk, that lacks a backbone or spinal column.
   无脊椎动物缺少脊骨或脊柱的动物，例如昆虫或软体动物