Definition of porencephalus in US English:

porencephalus

noun

Medicine
rare
  • = porencephaly.

Origin

Late 19th century; earliest use found in Brain: a journal of neurology. Alteration of either porencephalia or porencephaly (or their etymon German Porencephalie), after ancient Greek ἐγκέϕαλος; perhaps modelled on hydrocephalus, microcephalus, etc.