MYELITIS Meaning of MYELITIS in English ˌmīəˈlīd.ə̇s noun( plural myelit·i·des -lid.əˌdēz)Etymology: New Latin, from myel- + -itis : inflammation of the spinal cord or of the bone marrow Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012