sclerotome

from The Collaborative International Dictionary of English v.0.48

Sclerotome \Scler"o*tome\ (skl[e^]r"[-o]*t[=o]m or
   skl[=e]r"[-o]*t[=o]m), n. [Gr. sklhro`s hard + te`mnein to
   cut.] (Zool.)
   One of the bony, cartilaginous, or membranous partitions
   which separate the myotomes. -- {Scler`o*tom"ic}, a.
   [1913 Webster]