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adjective crus·tose \ˈkrəs-ˌtōs\

Definition of crustose

  1. :  having a thin thallus adhering closely to a substrate (as of rock, bark, or soil) <crustose lichens> — compare foliose, fruticose

Origin and Etymology of crustose

Latin crustosus crusted, from crusta

First Known Use: circa 1879

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