Definition of volcanos:
(n) :
A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.
(n) :
A kind of firework producing an upward plume of sparks.
(v) :
to erupt; to burst forth
(n) :
A census-designated place in Amador County, California, United States.