crus·​ta·​ceous ˌkrə-ˈstā-shəs How to pronounce crustaceous (audio)
: of, relating to, having, or forming a crust or shell

Example Sentences

Recent Examples on the Web From the deep-sea dwellers chomping on Cold War nuclear bomb particles to humble swimmers living in cave streams in Illinois, these crustaceous scavengers have adapted to all sorts of environments. Jason Daley, Smithsonian, 29 Oct. 2019 The light effluvia of Spanish sherry and the satin sweep of fresh crustaceous briny delight is all soon gone. Frier Mccollister, Orange County Register, 8 June 2017

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

Word History


New Latin crustaceus, from Latin crusta crust, shell

First Known Use

circa 1646, in the meaning defined above

Time Traveler
The first known use of crustaceous was circa 1646

Dictionary Entries Near crustaceous

Cite this Entry

“Crustaceous.” Dictionary, Merriam-Webster, Accessed 27 May. 2023.

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