A mesodermal somite. No longer in technical use.
The caudal half of a sclerotome that is the primordium of the vertebral centrum.provertebra
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for protovertebra
Historical Examples of protovertebra
At about the level of the fifth protovertebra the first trace of the urinary system appears.The Works of Francis Maitland Balfour, Volume 1
Francis Maitland Balfour