CUSPED • FREE-TRANSLATOR.COM • Definition of Cusped

... main vault is a pointed barrel with bold ribs; it is held up by a half-barrel over the aisles, which have groined vaults with very large transverse arches. The galleries over the aisles are lit by small pointed windows of two lights with a cusped circle between, but except in the lantern which has similar windows, in the transept ends and the west front, these are the only original openings which survive. (Fig. 20.) Both transepts have large rose ...

— Portuguese Architecture • Walter Crum Watson