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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.]


1. forming, resembling, or possessing a surrounding crust or shell
2. (Animals) zoology another word for crustacean2


(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]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.crustaceous - of or belonging to the class Crustacea
2.crustaceous - being or having or resembling a hard crust or shell
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.