/ Dictionary / Index M myelogram: Meaning and Definition of Find definitions for: my•e•lo•gram Pronunciation: (mī'u-lu-gram"), [key] — n. Med. an x-ray photograph of the spinal cord, following administration of a radiopaque substance into the spinal subarachnoid space. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: myelogram (Thesaurus) myelogenic myelography Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language