Definition of crustose in English:

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Pronunciation: /ˈkrʌstəʊs/


(Of a lichen or alga) forming or resembling a crust.
Example sentences
  • This tome includes detailed entries on more than 800 foliose, fruticose, and crustose lichens; essays on the biology, structure, uses, and ecological significance of these plants; and hundreds of color photographs.
  • These two genera are common crustose lichens on coniferous tree trunks.
  • In foliose lichens, there is a second cortex below the medulla, but in crustose and squamulose lichens, the medulla is in direct contact with the underlying substrate, to which the lichen is attached.


Late 19th century: from Latin crustosus, from crusta (see crust).

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