scleroderm

from The Collaborative International Dictionary of English v.0.48

Scleroderm \Scler"o*derm\ (? or ?; 277), n. [Gr. sklhro`s hard +
   de`rma skin: cf. F. scl['e]roderme.]
   (a) (Zool.) One of a tribe of plectognath fishes
       ({Sclerodermi}) having the skin covered with hard scales,
       or plates, as the cowfish and the trunkfish.
   (b) One of the Sclerodermata.
   (c) Hardened, or bony, integument of various animals.
       [1913 Webster]