ˈlīkənəs adjective
also li·chen·ose -ˌnōs
Etymology: lichen (I) + -ous or -ose
1.
a. : of, relating to, or resembling lichens
b. : abounding in or covered with lichens
a stone seat stood at one end, a fountain at the other, both lichenous and crumbling — Frederic Prokosch
2. : of or relating to lichen : lichenoid