Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From ancient Greek μυελός marrow, with change of ending after encephalon.
Definition of myelon in US English:
myelon
nounˈmʌɪɪlɒn
Anatomy rare
The spinal cord.
Origin
Mid 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From ancient Greek μυελός marrow, with change of ending after encephalon.