Area of mesoderm in the embryo that forms during neurulation, lies along both sides of the neural tube, and gives rise to the somites.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 790 (https://doi.org/10.1515/pac-2015-1202)