兎と唇しんとしんFreq.FrequencyTop 100,000Meanings1nouncleft lipmedicineMedical term for cleft lip. The synonym 口唇裂 (こうしんれつ) is more common in modern Japanese.See also: 口唇裂兎と唇しんは口こう唇しん裂れつの古ふるい呼よび方かたです。兎唇 is an older term for cleft lip.医い学がく書しょでは「としん」よりも「口こう