Usage examples for Quadrantal:

• I suggested to Monsieur Pin and others a quadrantal gate, turning on a pivot, and lifted by a lever like a pump- handle, aided by a windlass and cord, if necessary. "Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson" – Thomas Jefferson

• I proposed to fix there a fan- roof of quadrantal form, covering the upper flat stone of the external steps. "Autobiography of Sir George Biddell Airy" – George Biddell Airy

• By choice he would have made a good job of it and abolished the quadrantal correctors as well; but he judged he had done mischief enough to secure his ends, as it was. "Alias The Lone Wolf" – Louis Joseph Vance