Term: segmental plate posterior side
Name: segmental plate
Synonyms: presomitic mesoderm, PSM
Definition: Unsegmented field of paraxial mesoderm present posterior to the most recently formed somite pair, from which somites will form.
Ontology: Anatomy Ontology [ZFA:0000279]

Name: posterior side
Synonyms: caudal, posterior
Definition: An anatomical region that is the entire part of an anatomical structure posterior to a transverse plane and bounded on one side by the same transverse plane.
Ontology: Spatial Ontology [BSPO:0000056]