Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
|(Anat.)||a groove, in the epiblast of the vertebrate blastoderm, the edges of which unite, making a tube (the medullary canal) from which the brain and spinal cord are developed.|
See also: Medullary
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.