from The Century Dictionary and Cyclopedia
- n. The sheath of the root of a hair or feather, an invert of epidermis lining the follicle in which a hair or feather grows. See second cut under hair.
- n. In botany, a spongy transformation of the many-layered epidermis of the aërial roots of many orchids and various aroids; the velamen radicum.
Sorry, no etymologies found.
In it he demonstrated the existence of a hitherto unrecognised layer in the inner root-sheath of hairs, a layer that has been known since as Huxley's layer.
Epithelium fragments, probably portions of the internal root-sheath, sometimes adhere to the shaft of the hair as it grows up, and look like concretions.
_E_, external layer of the hair-follicle; _F_, middle layer of the hair-follicle; _G_, internal layer of the hair-follicle; _H_, papilla of the hair; _I_, external root-sheath; _J_, outer layer of the internal root-sheath; _K_, internal layer of the internal root-sheath.
_) Short, stout hair of beard, with the root-sheath attached, showing free spores and chains of spores.] #To what is ringworm due?