- The quartan malarial parasite Plasmodium malariae in its segmented or mature phase.
- A grouping of cells characteristic of neoplasms of neuroblastic, neuroectodermal, or ependymal origin; nuclei form a ring from which neurofibrils, which can be demonstrated by silver impregnation, extend to interlace in the center (Homer-Wright rosette); arrangement of ependymal cells around a vessel (perivascular pseudorosette) or around a space or channel (transependymal rosette).
- Roselike coiling of the uterus among certain pseudophyllidean tapeworms, such as Diphyllobothrium latum.
- Cells of one type surrounding a cell of another type.
[Fr. a little rose]
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