from The Century Dictionary.
- noun A substance allied to ceratin.
from the GNU version of the Collaborative International Dictionary of English.
- noun (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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry The
proteincomponent of the myelin sheath
Sorry, no etymologies found.
The axis-cylinder is said by some to be enveloped in a special reticular sheath, which separates it from the medullary sheath, and is composed of a substance called neurokeratin.