tricholith

trich·o·lith

(trik'ō-lith)
A concretion on the hair; the lesion of piedra.
[tricho- + G. lithos, stone]

tricholith

(trĭk′ō-lĭth) [″ + lithos, stone]
1. A hairy nodule on the hair; seen in piedra.
2. A calcified intestinal bezoar that contains hair.