poliomyelitis
Concise Oxford English Dictionary © 2008 Oxford University Press:
poliomyelitis /ˌpəʊlɪəʊmʌɪəˈlʌɪtɪs, ˌpɒlɪəʊ-/
▶noun Medicine an infectious viral disease that affects the central nervous system and can cause temporary or permanent paralysis.
– origin C19: mod. L., from Gk polios ‘grey’ + muelos ‘marrow’.
'poliomyelitis' also found in these Oxford entries:

