lamina den´sa an electron-dense layer of the basal lamina, consisting mainly of collagen fibrils and proteoglycans; it closely follows the plasma membrane of the basal aspect of the adjacent cell layer, from which it is separated by the lamina lucida (or the lamina rara in the renal glomerulus and pulmonary alveolus). Lamina is a noun that means a layer or thin sheet of tissue, or one of two curved parts at the back of a vertebra. Learn how to use it in biology, medicine and anatomy, and see examples and translations in different languages. lamina (plural lamina-lamina) (archaic) coat of mail lamina: a very thin layer of material In the context of the vertebral column, a lamina is part of a vertebra that forms the posterior portion of the vertebral arch, which serves to protect the spinal cord. It bridges between the more medial spinous process and the more lateral transverse processes.
