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Protovertebra is a 13 letter word which starts with the letter P and ends with the letter A for which we found 1 definitions.

(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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