crus·​tose ˈkrə-ˌstōs How to pronounce crustose (audio)
: having a thin thallus adhering closely to a substrate (as of rock, bark, or soil)
crustose lichens
compare foliose, fruticose

Examples of crustose in a Sentence

Recent Examples on the Web There are other species which act as calcifiers, adding to the carbonate foundation (such as crustose coralline algae). Christie Wilcox, Discover Magazine, 1 May 2016 There are three general categories of lichens: crustose which are small and carpet-like, foliose which have large, lettuce-like leaves, and fruticose which have more complex three-dimensional, often branch-like structures. Sarah White, Discover Magazine, 3 July 2019 This look like a crustose lichen, which is not a pathogenic problem. oregonlive, 25 July 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'crustose.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Latin crustosus crusted, from crusta

First Known Use

circa 1879, in the meaning defined above

Time Traveler
The first known use of crustose was circa 1879

Dictionary Entries Near crustose

Cite this Entry

“Crustose.” Dictionary, Merriam-Webster, Accessed 29 May. 2024.

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