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Of or relating to a lichen whose thallus is thin, crusty, and closely adherent to or embedded in the surface on which it grows.
(Biology) biology having a crustlike appearance: crustose lichens.
forming a crusty, tenaciously fixed mass that covers the surface on which it grows, as certain lichens.
[1875–80; < Latin crustōsus covered with a crust, derivative of crust(a) crust]
|Adj.||1.||crustose - (of lichens) having a thin crusty thallus that adheres closely to the surface on which it is growing; "crustose lichens"|