A group of cells all descended from one or other of an initial small group of cells.
The presence of two or more pupils in one eye.
A plant whose seed contains many or more than two cotyledons; such as, as certain gymnosperms.
Having the villi of the placenta collected into definite patches, or cotyledons.
In anatomy, one of the minute papillary processes on certain vascular membranes; a villosity; as, villi cover the lining of the small intestines of many animals and serve to increase the absorbing surface.
In botany, fine hairs on plants, resembling the pile of velvet.
A government of many rulers; polyarchy.
A reference to a government by many rulers.
Many diverse crops or species; also, multiculture.
Someone who cultivates a variety of crops or species.
Multiple pregnancies or bearing two or more fetuses simultaneously.
Pregnancy in which two or more fetuses exist simultaneously. It may be monovular (resulting from the fertilization of a single ovum) or polyovular (resulting from the fertilization of more than one ovum).
When more than two fetuses coexist, they may come from one ovum or be the result of combined monovular and polyovular twinning.
polycystic kidney disease
An inherited disorder that is characterized by the development of innumerable cysts in the kidneys that are filled with fluid and replace much of the mass of the kidneys.
Cysts are closed cavities or sacs, normal or abnormal, lined by epithelium, and especially containing a liquid or semisolid material. The cysts eventually reduce kidney function, leading to kidney failure.
1. A disorder characterized by an abnormal increase in the number of red blood cells in the blood.
2. Too many red blood cells which is the opposite of anemia.
Polycythemia formally exists when the hemoglobin, red blood cell count, and the total volume are all above normal.
1. A developmental anomaly characterized by the presence of supernumerary digits (fingers or toes) on the hands and/or feet.
2. Having more than the normal number of fingers or toes.
Related topics utilizing this poly- prefix: Polysemy and Polysemous and Polygamy Sections.
Inter-related cross references, directly or indirectly, involving word units meaning "more, plentiful, fullness, excessive, over flowing":