\Neu`ro*ker"a*tin\, n. [Neuro- + keratin.]
(Physiol. Chem.)
A substance, resembling keratin, present in nerve tissue, as
in the sheath of the axis cylinder of medullated nerve
fibers. Like keratin it resists the action of most chemical
agents, and by decomposition with sulphuric acid yields
leucin and tyrosin.