1844 H. M. Noad (ed. 2) viii. 366 On the shaft is mounted an A shaped frame.
1909 Suppl. A-frame, the A-shaped support for the cylinder-beam and cross-head guides of a vertical engine.
2005 C. Holmes xv. 111 When they got to the A-shaped greenhouse building, Gil led the way down the rows of newly potted seedlings.