Archit.
(in an English Perpendicular window) a compartment, approximately triangular, formed by the arch of the window, an arch of a lower tier of tracery, and a mullion of an upper tier of tracery.
Archit.
(in an English Perpendicular window) a compartment, approximately triangular, formed by the arch of the window, an arch of a lower tier of tracery, and a mullion of an upper tier of tracery.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012