Term: fin anatomical margin
Name: fin
Synonyms: fins
Definition: Surface structure involved in locomotion.
Ontology: Anatomy Ontology [ZFA:0000108]

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]