Term: rhombomere 4 ventral region
Name: rhombomere 4
Synonyms: r4
Definition: Hindbrain segment or neuromere posterior to rhombomere 3.
Ontology: Anatomy Ontology [ZFA:0001032]

Name: ventral region
Synonyms:
Definition: Anatomical region ventrally located on the body or body part.
Ontology: Spatial Ontology [BSPO:0000084]