AEtius, in his Tetrab. 4. serm. 4. ch. 103. says, that in some women a fleshy substance arises from the os uteri, and fills the vagina. Sometimes it protu-berates without the lips of the pudenda, like the tail of some animal. If this substance ever existed, it must have been enlarged clitoris, or, if a disease, a polypus.

In order to extirpate it, he advises to extend it with a forceps, and then cut it off; after which it must be dressed with lint dipped in rough wine. It is also a name of the os coccygis.

Cauda Equina. In anatomy the medulla spinalis ends about the first or second lumbar vertebra, and there forms itself into many branches, which receive all together the name cauda equina, from being like a horse's tail. From the loins downwards the holes in the vertebrae are somewhat lower than the origin of the nerves that pass through them; hence it is of importance, when any disorder arises from an injury of any of the nerves below the first and second lumbar vertebra, to advert to this circumstance; and, as at the first or second vertebra of the loins the cauda equina begins, so, in tracing the source of all the nerves below these parts, this is their origin. See Lumbares.

Cauda muris. A species of ranunculus. Sec also Myosurus.

Cauda porcina. See Peucedanum.

Cauda vulpis rubicundi. A preparation of lead.