| Name: | EVL | 
|---|---|
| Synonyms: | enveloping layer | 
| Definition: | Outermost monolayer of cells surrounding the embryo that become very flattened in the blastula and give rise to the periderm. Sometimes used synonymously with periderm. | 
| Ontology: | Anatomy Ontology [ZFA:0000086] | 
| Name: | anatomical margin | 
|---|---|
| Synonyms: | edge, margin | 
| Definition: | Fiat anatomical region extending a short distance from the boundary of an object inwards. | 
| Ontology: | Spatial Ontology [BSPO:0000006] |