|OBO ID: ZFA:0000006|
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|Term Name:||ball||Search Ontology:|
|Definition:||The anterior round region of the yolk cell present after the yolk extension forms during the segmentation period. (1)|
|Appears at:||Segmentation:10-13 somites (14.0h-16.0h)|
|Evident until:||Larval:Day 4 (96.0h-120.0h)|