Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc.

Covered with lichen.

(biology) The symbiotic relationship that gives rise to a lichen.

plural of lichenization

(lichenology) The process by which a fungus becomes a mycobiont of a lichen. / (dermatology) Synonym of lichenification.

simple past tense and past participle of lichenize

(mycology, of a fungus) Adapted to live as a symbiont in a lichen.

(organic chemistry) Any salt or ester of lichenic acid

Relating to, or obtained from lichens

(transitive) To cover with lichens.