fissure
131primary fissure — n a fissure of the cerebellum that is situated between the culmen and declive and that marks the boundary between the anterior lobe and the posterior lobe …
132pterygomaxillary fissure — n a vertical gap between the lateral pterygoid plate of the pterygoid process and the maxilla that descends at right angles to the medial end of the inferior orbital fissure and gives passage to part of the maxillary artery and vein * * * fissura …
