a. [ Gr. &unr_; glassy, transparent; "y`alos glass + &unr_; appearance: cf. F. hyaloïde.] (Anat.) Resembling glass; vitriform; transparent; hyaline; as, the hyaloid membrane, a very delicate membrane inclosing the vitreous humor of the eye. [1913 Webster]

a. [ Gr. myelo`s marrow + -oid. ] Resembling marrow in appearance or consistency; as, a myeloid tumor. [ 1913 Webster ]

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. [ 1913 Webster ]