hard-shell

adjective

1. Also hard-shelled. having a firm, hard shell, as a crab in its normal state; not having recently molted.
2. rigid or uncompromising.

noun

3. hard-shell crab.

adjective also: hard-shelled

1. zoology having a shell or carapace that is thick, heavy, or hard
2. US strictly orthodox

noun

3. another name for the quahog