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1. Having, resembling, or constituting a hard crust or shell.
2. Crustacean.

[Latin crūsta, shell; see kreus- in Indo-European roots + -aceous.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. forming, resembling, or possessing a surrounding crust or shell
2. (Animals) zoology another word for crustacean2
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(krʌˈsteɪ ʃəs)

1. of the nature of or pertaining to a crust or shell.
3. having a hard covering or crust.
[1640–50; < New Latin crūstāceus (adj.) hard-shelled. See crustacean, -aceous]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.crustaceous - of or belonging to the class Crustacea
2.crustaceous - being or having or resembling a hard crust or shell
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
A minute crustaceous animal (Cancer salinus) is said [4] to live in countless numbers in the brine-pans at Lymington: but only in those in which the fluid has attained, from evaporation, considerable strength -- namely, about a quarter of a pound of salt to a pint of water.
The Siberian salt-lakes are inhabited by small crustaceous animals; and flamingoes (Edin.
Acidity, roughness and crevices make Quercus a very good phorophyte for the development of lichens (Ozturk & Oran 2011), the distribution of lichens is determined by the substrate (precisely its chemical nature for crustaceous), habitat (age, history and forest productivity) and climate (Ellis et al.
The main signs and symptoms are a crustaceous lesion (early) or eschar (late) at the site of the tick's attachment and regional painful lymph nodes (10,11).
This crustaceous endeavor's ending date depends on the season and ice; some years they can't finish until late May.