Term: ball acid secretion
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: acid secretion
Synonyms:
Definition: The controlled release of acid by a cell or a tissue.
Ontology: GO: Biological Process [GO:0046717]    QuickGO    AmiGO