lichen

lichen is a topic covered in the Taber's Medical Dictionary.

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(lī′kĕn )

[Gr. leichēn, lichen]

1. Any form of papular skin disease, esp. lichen planus.
2. In botany, any of numerous plants consisting of a fungus growing symbiotically with algae. They form characteristic scaly or branching growths on rocks or barks of trees.

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