Bible Dictionaries
Protovertebra
Webster's Dictionary
(n.) 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.
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Bibliography Information
Webster, Noah. Entry for 'Protovertebra'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/p/protovertebra.html. 1828.