Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. 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.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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.

from The Century Dictionary and Cyclopedia

  • n. A mixture of protagon and lecithalbumins occurring in the rods and hexagonal epithelial cells of the retina.

Etymologies

myelin +‎ -oid +‎ -in (Wiktionary)

Examples

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