Alveololingual groove

(1) that part of the oral cavity proper, on each side of the frenulum of the tongue, between the tongue and the mandibular alveolar process or ridge; (2) in the embryo, the groove on each side between the lingual primordium and the alveolar elevations of the mandible. SYN: alveololingual sulcus, gingivolingual groove, gingivolingual sulcus.