abnormal tongue morphology abnormal median sulcus of tongue morphology 2022-10-17T10:17:51Z any structural anomaly of the slight longitudinal depression on the dorsal surface of the tongue which extends from the tip of the tongue to the foramen cecum and divides the dorsum into right and left halves MPheno.ontology MP:0031451 abnormal median longitudinal raphe of tongue morphology abnormal median groove of tongue morphology