protovertebra

/P R OW0 T AH0 V ER1 T AH0 B R AH0/
noun
  1. 1

    (obsolete, anatomy) One of the primitive masses, or segments, into which the mesoblast of the vertebrate embryo breaks up on either side of the anterior part of the notochord; a mesoblastic, or protovertebral, somite.

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