唇しん裂れつMeanings1nouncleft lipmedicineMedical term for a congenital split in the upper lip. Often discussed alongside cleft palate (口蓋裂).See also: 口唇裂唇しん裂れつは、生うまれつき上うわ唇くちびるが裂さけている状じょう態たいを指さす医い学がく用よう語ごです。Cleft lip is a medical term for a condition where the upper lip is split from birth.