conoidal vault
An expanding vault with the cross section at the small end in the shape of a semicricle and at the large end in the shape of a semiellipse with its long axis vertical; the ridge line is a sloped straight line. (Bucher, 1996)
An expanding vault with the cross section at the small end in the shape of a semicricle and at the large end in the shape of a semiellipse with its long axis vertical; the ridge line is a sloped straight line. (Bucher, 1996)