Table 2.

Proposed Nomenclature System for Embryoids

Topic	Definition	Example
Cell culture	2D versus 3D	2D
Animal	species of cell used	H
Cell type	cells used	E
Modifier	additional notes, such as process or pathway used	BMP (BMP-induced differentiation)
Model	Tissue or embryonic stage	Gastruloid

A nomenclature system should include various areas (noted here as topics) to help differentiate different embryoid models from others and note subtle but significant differences.

E, ESC.