ベル麻ま痺ひMeanings1nounBell's palsymedicineMedical term for acute peripheral facial nerve paralysis, usually unilateral and temporary.ベル麻ま痺ひは顔かおの片かた側がわの筋きん肉にくが突とつ然ぜん動うごかなくなる病びょう気きです。Bell's palsy is a condition in which the muscles on one side of the face suddenly become paralyzed.