Meaning of nonan in English:

nonan

Pronunciation /ˈnəʊnən/

adjective

rare, historical Medicine
  • Of a fever: recurring every eighth day (by inclusive reckoning every ninth day).

Origin

Early 17th century (in an earlier sense). From classical Latin nōnus ninth + -an, probably after French †nonane. Compare classical Latin nōnānus belonging to the ninth legion.