The Collaborative International Dictionary
Myeloidin
Myeloidin \My`e*loid"in\, n. [Myelin + -oid + -in.] (Physiol. Chem.) A substance, present in the protoplasm of the retinal epithelium cells, and resembling, if not identical with, the substance (myelin) forming the medullary sheaths of nerve fibers.
Wiktionary
myeloidin
n. (context biochemistry English) A substance present in the protoplasm of the retinal epithelium cells, and resembling, if not identical with, the myelin that forms the medullary sheaths of nerve fibres.