from The Century Dictionary.
- noun That form of the fungus causing tinea or ringworm which produces its mycelium and spores within the shaft of the affected hairs.
Sorry, no etymologies found.
Of this latter there are two main subvarieties -- endothrix and ectothrix.
The small-spored fungus is found as the cause in the majority of scalp cases; the endothrix also commonly invades the scalp integument.