Definify.com
Webster 1913 Edition
Medullary
Med′ul-la-ry
,Adj.
[L.
medullaris
, fr. medulla
marrow: cf. F. médullaire
.] 1.
(Anat.)
(a)
Pertaining to, consisting of, or resembling, marrow or medulla.
(b)
Pertaining to the medula oblongata.
2.
(Bot.)
Filled with spongy pith; pithy.
Medullary groove
(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.
– Medullary rays
(Bot.)
, the rays of cellular tissue seen in a transverse section of exogenous wood, which pass from the pith to the bark.
– Medullary sheath
(Anat.)
, the layer of white semifluid substance (myelin), between the primitive sheath and axis cylinder of a medullated nerve fiber.