Lewis Short
līchēn (noun M) = λειχήν:
* A cryptogamic species of vegetation growing on trees, lichen.
* Lit., Plin. 26, 4, 10, § 21.
* Transf., an eruption on the skin of men and beasts, a tetter, ringworm: in fricando lichene,Plin. 23, 7, 63, § 118: sordidi lichenes,Mart. 11, 98, 5.—Of beasts, Plin. 30, 10, 27, § 88.
* Esp., a callous excrescence upon the leg of a horse, used as a medicine: lichene equi cum oleo infuso per aurem,Plin. 28, 11, 49, § 180; 28, 17, 67, § 230 saep.
Charlton T. Lewis, Charles Short, A Latin Dictionary