notochord

Definitions of notochord
  1. noun
    a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates
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    types:
    urochord
    a notochord of a larval tunicate typically confined to the caudal region
    type of:
    back, backbone, rachis, spinal column, spine, vertebral column
    the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
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