medullary : Idioms & Phrases
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.
Webster 1913
medullary ray
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noun a sheet of vascular tissue separating the vascular bundles
vascular ray; medullary ray.
WordNet
Medullary rays
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noun a sheet of vascular tissue separating the vascular bundles
vascular ray; medullary ray.
WordNet
(Bot.) , the rays of cellular tissue seen in a transverse section of exogenous wood, which pass from the pith to the bark.
Webster 1913
Medullary sheath
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noun a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
myelin sheath.
WordNet
(Anat.) , the layer of white semifluid substance (myelin), between the primitive sheath and axis cylinder of a medullated nerve fiber.
