lichenification

noun
li·​chen·​i·​fi·​ca·​tion | \ lī-ˌken-ə-fə-ˈkā-shən How to pronounce lichenification (audio) , ˌlī-kən- How to pronounce lichenification (audio) \

Medical Definition of lichenification

: the process by which skin becomes hardened and leathery or lichenoid usually as a result of chronic irritation also : a patch of skin so modified

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one from the Upper Peninsula of Michigan

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