- getting the form of a placenta, or thickened disk notably thinner towards middle.
- Having the model of a placenta, or circular thickened disk significantly thinner in regards to the middle.
- In zoology, getting the kind, structure, or character of a placenta.
- In botany, formed like a placenta; having a thick circular disk, concave in the middle on both top and reduced edges. The main of Cyclamen is an illustration.