The tuberculum sellae (or the tubercle of the sella turcica) is a part of the sphenoid bone that is an elevation behind the chiasmatic groove. A variable slight to prominent median elevation forming the posterior boundary of the chiasmatic groove and the anterior boundary of the hypophysial fossa.
The trigeminal tubercle, or tuberculum cinereum is a raised area between the rootlets of the accessory nerve and posterolateral sulcus. It overlies the spinal tract of the trigeminal nerve.
In anatomy, a tubercle (literally 'small tuber', Latin for 'lump') is any round nodule, small eminence, or warty outgrowth found on external or internal organs of a plant or an animal.