Table 1.

Examples of Names for Embryoids and Their Definitions

Name	Definitions	Citations
General name
Artificial embryo	differentiating PSCs that model/mimic an embryo, most commonly used in the media and ISSCR	Wysocka and Rossant (2019)
Embryoid	first designated in 1902 to describe a tumor; more currently it refers to an organized embryoid body, made up of differentiating PSCs that model/mimic an embryo	Simunovic and Brivanlou (2017)
Embryonic organoid	differentiating PSCs that model/mimic an embryo	Turner et al. (2017)
SHEEFs	synthetic entities with embryo-like features	Aach et al., (2017)
Synthetic embryo	differentiating PSCs that model/mimic an embryo, most commonly used in the media	Denker (2014); Warmflash (2017).
Developmental time-based name
Blastoid	an embryoid modeling the blastocyst stage of development	Rivron et al. (2018)
Gastruloid	2D or 3D embryoids modeling the gastrulation stage of development	van den Brink et al., (2014)
PASE	Post-implantation amniotic sac embryoid	Shao et al. (2017)
Cell-based name
Micropatterned hESC colonies	2D models of the gastrulation stage of development	Warmflash et al. (2014)
ETS embryo	embryoids from embryonic and trophoblast stem cells with a 3D structure	Harrison et al. (2017)
ETX embryo	Embryoids from embryonic, trophoblast, and extra-embryonic endoderm stem cells	Sozen et al. (2018)

h, human; ISSCR: International Society for Stem Cell Research; PSCs: pluripotent stem cells.