(volcanology) A roughly circular mound-shaped bulge that builds up from the slow eruption of viscous felsic lava from a volcano.

(architecture) An onion-shaped dome, characteristic of august buildings in Moghul and Russian architecture

(idiomatic, indelicate, sometimes offensive) A bald head; a person who is bald. / (US, military) A haircut in which the hair is clipped extremely close to the scalp.

A dome fitted to the top of a boiler where steam is collected before being used in the cylinders.

(rail transport) A sand reservoir mounted on top of the boiler of a steam locomotive. The sand was used on wet rails to prevent slipping.

plural of dome car

(rail transport) A railroad passenger car with a glass observation dome.

A thought experiment that exhibits a nondeterministic system within the bounds of Newtonian mechanics. It involves an idealized particle initially sitting motionless at the apex of an idealized radially symmetrical frictionless dome of a certain form. The particle may, after an arbitrary period of time, slide down the dome in an arbitrary direction, contrary to intuition.

Alternative spelling of doubledome

Alternative form of chrome dome