Definition of crustose in English:

crustose

Syllabification: crus·tose
Pronunciation: /ˈkrəsˌtōs
 
/

adjective

Botany
  • (Of a lichen or alga) forming or resembling a crust.
    More 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.

Origin

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

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