lichen
Lichen growing on a rock.
Meaning
Noun
- 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.
- Something which gradually spreads across something else, causing damage.
Related
Narrower meaning words
Origin
- Borrowed from Latin līchēn ("ringworm"), from Ancient Greek λειχήν.
Modern English dictionary
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