Definition is a rhetorical mode that can be used in something smaller or shorter than a full paper. You can use extended definition for several paragraphs only in a paper of much greater length. You also can add to a paper a one-paragraph definition--like a brief encyclopedia definition.
The research group, headed by Dr. Lukas Sommer at the Swiss Federal Institute of Technology, has identified a heretofore unknown role for the TGF cell-to-cell signaling pathway in the pathogenesis of DiGeorge syndrome.
Sjogren's syndrome is a chronic, slowly progressive, inflammatory autoimmune disorder characterized by the infiltration of specialized cells of the immune system called lymphocytes (T-cells in the majority of cases), monocytes, and plasma cells into the parotid (salivary) glands and lacrimal (tear) glands.he signs and symptoms of Sjogren's syndrome that affects other areas of the body, known as systemic or extraglandular features of Sjogren's, which may include: 1  Sinus symptoms. 2  Cutaneous (skin) symptoms. 3  Vasculitis-inflammation of the blood vessels.