This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Having, resembling, or constituting a hard crust or shell.

adj. Crustacean.

adj. Resembling a crustacean.

adj. Pertaining to, or of the nature of, crust or shell; having a crustlike shell.

adj. Belonging to the Crustacea; crustacean.

Pertaining to crust; like crust; of the nature of a crust or shell.

In zoology: Having a crust-like shell; belonging to the Crustacea; crustacean.

In entomology, having a somewhat hard and elastic texture, resisting slight pressure, but not rigid: said of parts of the integument.

In botany: Hard, thin, and brittle.

In lichenology, forming a flat crust in or upon the substratum, and adhering to it firmly by the whole under surface, so as not to be separable without injury: applied to the thallus of lichens.

adj. being or having or resembling a hard crust or shell

adj. of or belonging to the class Crustacea

"On this shining shell I discovered a new kind of crustaceous animal, of a beautiful ultramarine blue, like the shell; I knew this to be a Pinnothera."

crustacean   

Ignatius    audacious    capacious    ceraceous    efficacious    fallacious    flirtatious    gracious    hellacious    herbaceous   

coal-bearing    carbonaceous    Devonian    mealy