composed primarily of pluripotent stem cell embryonic structure embryoid body Wikipedia:Embryoid_body embryonic body MESH:D058732 EFO:0004988 BTO:0001718 Embryoid bodies are structures resembling embryos, occurring in several types of germ cell tumors[BTO]. EDITOR_NOTE in future this class may be ceded to another ontology if it falls outside the scope of in-vivo, non-pathological biology Embryoid bodies (EBs) are three-dimensional aggregates of pluripotent stem cells. UBERON:0014374