Aerostat(n.) A balloon.
Aerostat(n.) A balloonist; an aeronaut.
Aerostatic(a.) Alt. of Aerostatical
Aerostatical(a.) Of or pertaining to aerostatics; pneumatic.
Aerostatical(a.) Aeronautic; as, an aerostatic voyage.
Aerostatics(n.) The science that treats of the equilibrium of elastic fluids, or that of bodies sustained in them. Hence it includes aeronautics.

Words within aerostats