Medullary /(?)/

Med·ul·la·ry

Medullary

a.
  1. Pertaining to, consisting of, or resembling, marrow or medulla. (Anat.)
  2. Filled with spongy pith; pithy. (Bot.)

Phrases & Compounds
Medullary groove
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.
Medullary rays
the rays of cellular tissue seen in a transverse section of exogenous wood, which pass from the pith to the bark.
Medullary sheath
the layer of white semifluid substance (myelin), between the primitive sheath and axis cylinder of a medullated nerve fiber.