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.
英语词典包含243303条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。