Protovertebra(redirected from provertebra)
Also found in: Medical.
|n.||1.||(Anat.) 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. See Illust. of Ectoderm.|
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.