Term: ball microglial cell
Name: ball
Synonyms: yolk ball
Definition: The anterior round region of the yolk cell present after the yolk extension forms during the segmentation period.
Ontology: Anatomy Ontology [ZFA:0000006]

Name: microglial cell
Synonyms: microglia
Definition: A central nervous system macrophage found in the parenchyma of the central nervous system.
Ontology: Anatomy Ontology [ZFA:0009077]