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Webster 1913 Edition


Protovertebra

Proˊto-ver′te-bra

,
Noun.
;
pl.
Protovertebræ
.
[
Proto-
+
vertebra
.]
(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
.
☞ The protovertebræ were long regarded as rudiments of the permanent vertebræ, but they are now known to give rise to the dorsal muscles and other structures as well as the vertebral column. See
Myotome
.

Definition 2024


protovertebra

protovertebra

English

Noun

protovertebra (plural protovertebrae)

  1. (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.