microcotyledons

microcotyledons

a microscopic grouping together of villi in the equine placenta in a manner similar to that in ruminants.
References in periodicals archive ?
The major difference between these species is that the villi are scattered throughout the surface in the pig, whereas in the horse they are organized in small clusters called microcotyledons.
Microcotyledons A structure of the fetal placenta supplied with blood vessels and forming chorionic villi, which attaches to the uterine endometrium.