noun.
In architecture, a vault, either hemispherical or produced by the revolution about its axis of two curves intersecting at the apex, or by a semi-ellipse covering a circular or polygonal area, and supported either upon four arches or upon solid walls.
noun.
The round top of any structure, as of a furnace; the structure itself. See cupola-furnace. Specifically
noun.
Milit., a revolving shot-proof turret, formed of strong timbers, and armored with massive iron plates.
noun.
In anatomy: The summit of the cochlea. The summit of an intestinal gland.
noun.
In conchology, the so-called dorsal or visceral hump, made by the heap of viscera.