Arch. [Fr.; formerly chambransle, of uncertain origin: see Littré.] ‘An ornamental bordering on the sides and tops of doors, windows, and fireplaces’ (Gwilt).
1704. J. Harris, Lex. Techn., Chambranle, an Ornament in Masonry and Joyners Work, bordering the three sides of Doors, Windows, and Chimneys.
1842–75. Gwilt, Encycl. Archit. Gloss. s.v., The top of a three-sided chambranle is called the transverse, and the sides ascendants.
