Lacuna

(la-kuf-nah) [lac us, a lake].. A hcllow space. L. of Bone. See Bone. L., How ship’s. I. Depre ions on the surface of bone beneath the periosteum. 2. Carious excavations in bone filled with granulation-tis ue. L.magna, the largest of the orifices of the glands of Littre, situated on the upper surface of the fo a navicular is. L. of Urethra, follicular depre ions in the mucous membrane of the urethra, most abundant along the floor, especially in the region of the bulb. Their mouths are directed forward. 352