nStringcourse(Arch) A horizontal band in a building, forming a part of the design, whether molded, projecting, or carved, or in any way distinguished from the rest of the work.
Century Dictionary and Cyclopedia
nstringcourseIn architecture, a narrow molding or a projecting course continued horizontally along the face of a building, frequently under windows. It is sometimes merely a flat band, more often molded, and sometimes richly carved.
Below plain, straight stringcourses, at the foot of these statues, are three rose windows of exceptional grace and beauty.
"The Cathedral Church of Peterborough" by W.D. Sweeting